Best Items Against Full AD and Full AP Comps in Season 16

You load into champion select and notice the enemy has locked in Zed mid, Talon jungle, Jayce top, Draven bot, and Pyke support. Every single one of them deals physical damage. This is one of the most exploitable draft mistakes in League of Legends, and if you know how to itemize correctly, you can turn what looks like a normal ranked game into a free win.

The same principle applies in reverse. When the enemy team goes full AP - something like Rumble top, Diana jungle, Syndra mid, Ziggs bot, and Lux support - a single well-timed magic resist purchase can nullify thousands of gold worth of their damage.

This guide covers exactly which items to build in both scenarios, backed by win rate data from millions of ranked games in Season 16. We will break down the math behind effective HP, explain why "diminishing returns on armor" is a myth, and give you a concrete item priority list for every role.

Understanding Effective HP - Why Stacking One Resistance Works

Before diving into specific items, you need to understand the core math that makes counter-stacking so powerful. Many players believe that armor has diminishing returns, and this misconception costs them games. Here is the truth:

Armor does not have diminishing returns on effective HP. The damage reduction formula in League of Legends is:

Damage Multiplier = 100 / (100 + Armor)

Effective HP = Max HP x (100 + Armor) / 100

Each point of armor increases your effective HP against physical damage by exactly 1% of your maximum health. Going from 0 to 100 armor doubles your effective HP. Going from 100 to 200 armor adds the same flat amount of effective HP as going from 0 to 100 did. The percentage damage reduction curve looks like it has diminishing returns because going from 50% to 75% reduction "feels" smaller than going from 0% to 50%, but in terms of actual damage you can survive, each armor point is equally valuable.

This is why stacking armor against a full AD team is so devastating. Normally you need to split your defensive budget between armor and magic resist. When the enemy only deals one damage type, every single defensive gold piece you spend works at maximum efficiency.

The Armor-HP Balance Point

While armor does not have diminishing returns on effective HP, there is a cost-efficiency breakpoint where buying health becomes more gold-efficient than buying more armor. The simplified rule: match your bonus armor to your bonus HP on a roughly 1:1 ratio for maximum effective HP per gold. In practice, most armor items include some health already (Thornmail gives 350 HP + 60 armor, Randuin's gives 250 HP + 80 armor), so the balance tends to work itself out naturally if you are buying the right items.

Against a full AD comp, you can safely skew toward more armor-heavy items like Frozen Heart (pure armor + mana, no health) because the total armor-to-HP ratio across your full build will still be reasonable.

Best Armor Items Against Full AD Comps

Here are the top armor items in Season 16, ranked by their effectiveness when the enemy team is entirely physical damage. Win rate data is sourced from Platinum+ ranked games globally on Patch 26.5.

Item	Stats	Gold	Key Passive	Win Rate
Frozen Heart	75 Armor, 400 Mana, 20 AH	2500	Winter's Caress - reduces nearby enemies' attack speed by 20%	53.4%
Randuin's Omen	80 Armor, 250 HP, 10 AH	2900	Active: 99% slow + reduces AD by 10% and crit damage by 20% for 4s	51.8%
Thornmail	60 Armor, 350 HP	2900	Thorns: reflects damage + applies Grievous Wounds (40/60%)	51.8%
Dead Man's Plate	60 Armor, 425 HP	2900	Momentum: up to 60 bonus move speed, bonus magic damage on hit	51.2%
Unending Despair	50 Armor, 400 HP, 15 AH	2800	Anguish: deals damage and heals in combat every 7s	52.1%
Iceborn Gauntlet	50 Armor, 300 HP, 15 AH	2900	Spellblade: empowered auto + slowing frost field	50.8%
Jak'Sho, The Protean	45 Armor, 45 MR, 350 HP	3200	Stacking resistances in combat (+16 each), then AoE burst + heal	51.5%

Tier 1: Frozen Heart - The Anti-AD King

Frozen Heart is the single best item against full AD compositions and it is not close. At just 2500 gold, it provides 75 armor - the most raw armor of any completed item in the game. Its 20% attack speed reduction aura cripples auto-attack reliant champions like Draven, Jinx, Yasuo, and Tryndamere even further. The 400 mana is a nice bonus for champions like Malphite, Maokai, and most support tanks.

The 53.4% win rate speaks for itself. Frozen Heart is gold-efficient at 104% even before counting the attack speed aura, which has no gold value assigned to it. Against a team of five physical damage dealers, this item's value skyrockets because you are getting maximum defensive utility from every stat it provides.

Tier 1: Randuin's Omen - The Crit Counter

If the full AD comp includes crit-building marksmen (and it usually does), Randuin's Omen is your second priority. The 80 armor is excellent, and the active ability is devastating in teamfights - a 99% slow followed by a 10% AD reduction and 20% crit damage reduction for 4 seconds. The Rock Solid passive further reduces incoming basic attack damage by 5 per 1000 max HP, which stacks brilliantly with the high HP totals you will accumulate.

Frozen Heart + Randuin's Omen together give you 155 armor, 250 HP, and passives that reduce both enemy attack speed and crit effectiveness. This combination alone can make you nearly unkillable for an AD-heavy team in the mid-game.

Tier 2: Thornmail - When They Heal

Thornmail is less about the raw armor (60 is the lowest of the dedicated armor items) and more about the Grievous Wounds. If the enemy full AD team includes champions with significant healing - Draven with Bloodthirster, Aatrox, Irelia, or any marksman running Legend: Bloodline and lifesteal items - Thornmail becomes essential. The reflected damage scales with your bonus armor (10% of bonus armor per hit), which means it gets stronger the more armor you stack. In a full armor build, each Thorns proc can deal meaningful damage.

Tier 2: Dead Man's Plate and Unending Despair

Dead Man's Plate is the roaming tank's armor item. The 60 bonus movement speed at full Momentum stacks makes it easy to get to fights and engage. Against full AD, it provides solid 60 armor and 425 health, and the mobility helps you stick to enemy carries.

Unending Despair is the sustained fighting option. Its Anguish passive heals you based on bonus health, which synergizes well with the large HP pools you build naturally from stacking armor items that include health. The 15 ability haste also helps you rotate defensive cooldowns faster.

Season 16 Addition: Protoplasm Harness

New in Season 16, Protoplasm Harness deserves special mention. At 2500 gold, it provides 600 health and 15 ability haste with a Lifeline passive: when you drop below 30% HP, you gain 200 bonus health and heal for 200-400 (scaling with level) plus 250% of your bonus armor and 250% of your bonus magic resistance over 5 seconds. You also gain 15% size, 10% move speed, and 25% tenacity during the heal.

Against a full AD team where you have stacked 200+ bonus armor, the heal from Protoplasm Harness can exceed 700 HP. This makes it an exceptional complementary item to your armor stack - buy the armor items first, then grab Protoplasm Harness to give yourself a massive effective HP buffer. The 58.3% win rate on champions that build it confirms its power.

Armor Stacking Priority by Role

• Tanks (Top/Support): Plated Steelcaps, Frozen Heart, Randuin's Omen, Thornmail (if healing), Dead Man's Plate. You can realistically hit 300+ armor by 3 items.
• Bruisers/Fighters: Plated Steelcaps, Iceborn Gauntlet or Dead Man's Plate, then Randuin's Omen. Balance damage items with 1-2 armor items.
• Mages (Mid): Plated Steelcaps (yes, skip Sorcerer's Shoes), Zhonya's Hourglass for the 45 armor + Stasis active.
• Marksmen (Bot): Plated Steelcaps, Guardian Angel. You still need damage, but these two items provide enough armor to not get one-shot.

Best Magic Resist Items Against Full AP Comps

Full AP team compositions are less common than full AD, but they do happen - and when they do, MR stacking is even more effective because magic resist itemization is generally more expensive and harder to shred. There is no AP equivalent to Black Cleaver's armor shredding, and Void Staff's 40% magic penetration, while strong, is a single item rather than a systemic threat.

Item	Stats	Gold	Key Passive	Win Rate
Spirit Visage	450 HP, 40 MR, 10 AH, 150% base HP regen	2900	Boundless Vitality: +25% healing and shielding received	56.0%
Kaenic Rookern	400 HP, 80 MR	2900	Magebane: magic shield for 20% max HP after 12s out of combat	54.2%
Force of Nature	400 HP, 55 MR, 5% move speed	2800	Absorb: at 8 stacks from magic damage, gain +70 MR and +10% move speed	53.9%
Abyssal Mask	350 HP, 45 MR, 15 AH	2650	Unmake: nearby enemies take 12% more magic damage	56.4%
Hollow Radiance	400 HP, 40 MR, 10 AH	2800	AoE magic damage burn around you; Immolate stacks in combat	52.5%
Banshee's Veil	65 AP, 45 MR, 10 AH	2600	Spell shield that blocks one enemy ability (40s refresh)	52.8%
Maw of Malmortius	60 AD, 40 MR, 15 AH	2800	Lifeline: magic damage shield when low HP, bonus omnivamp while active	53.1%

Tier 1: Kaenic Rookern - The MR Equivalent of Frozen Heart

Kaenic Rookern is the definitive anti-AP item in Season 16. With 80 magic resistance - the highest of any single item in the game - it is the MR counterpart to Frozen Heart's armor dominance. The Magebane passive adds a magic damage shield equal to 20% of your maximum HP that refreshes after 12 seconds out of champion combat. Against a full AP team, this shield will absorb an entire rotation from most mages before the fight even starts.

The 400 HP provides a solid health foundation, and at 2900 gold, the item is reasonably affordable. The 54.2% win rate reflects how strong it is even in normal team compositions - against full AP, it becomes borderline broken.

Tier 1: Force of Nature - Unstoppable Against Sustained AP

Force of Nature starts with a respectable 55 MR, but its true power activates during extended fights. Each instance of magic damage you take generates a stack (up to 8), and at maximum stacks you gain the Steadfast buff: +70 bonus magic resistance and +10% bonus movement speed. That means Force of Nature provides up to 125 total MR at full stacks, making it the highest effective MR item in the game during teamfights.

Against full AP comps where every ability hitting you is magic damage, you will reach 8 stacks almost instantly. The bonus movement speed helps you dodge skillshots and reposition, which is critical against mages who rely on landing combos. The 53.9% overall win rate undersells its effectiveness in the specific scenario of facing five magic damage dealers.

Tier 1: Spirit Visage - The Healing Amplifier

Spirit Visage holds the highest overall win rate of any MR item at 56.0%, though this is partly because it is often built by ahead champions who benefit from its healing amplification. The 25% increase to all healing and shielding received is enormous on champions like Dr. Mundo, Volibear, Warwick, and anyone running Conqueror. The 450 HP is the most health of any MR item, contributing heavily to effective HP.

Against a full AP team, Spirit Visage ensures that your sustain stays relevant throughout the game. Magic damage dealers generally rely on bursting you down before you can heal back - Spirit Visage directly counters that strategy.

Tier 2: Abyssal Mask - For AP Tanks and Engagers

Abyssal Mask has the highest win rate in its category at 56.4%, largely due to its Unmake aura: nearby enemies take 12% more magic damage from all sources. If you are playing a tank or engage support and your team has even one AP damage dealer, Abyssal Mask amplifies their damage while making you harder to kill. Against full AP, the 45 MR and 350 HP keep you alive while the aura ensures your team's damage output stays relevant.

Role-Based MR Items

• AD Carries and Fighters: Maw of Malmortius is your primary MR option. The Lifeline shield and omnivamp on trigger give you a second life against AP burst. Wit's End is another strong option that provides MR alongside attack speed and on-hit magic damage.
• AP Mages: Banshee's Veil blocks a critical ability (Syndra stun, Lux binding, Veigar cage) while providing 45 MR and 65 AP so you do not sacrifice as much damage.
• Tanks: Stack Kaenic Rookern + Force of Nature + Spirit Visage. This triple gives you 175 base MR (up to 245 with FoN stacks), 1250 bonus HP, and enhanced healing. Most mages will deal negligible damage to you.

The Penetration Problem - Why Stacking Works

A common concern about stacking one resistance type is: "Won't they just buy penetration?" The answer is yes, they will - but penetration has item group restrictions that limit how much any single champion can acquire.

Against Full AD Teams

Physical damage dealers have access to percentage armor penetration through Lord Dominik's Regards (35% armor pen) or Serylda's Grudge (30% armor pen), but these are in the same item group and cannot be stacked together. Black Cleaver provides up to 30% armor reduction (6 stacks of 5%), and it does stack with percentage penetration, but it requires extended trading to apply fully. Even in the worst case where an ADC has Lord Dominik's Regards (35% pen) against your 300 armor, they are only penetrating 105 armor, leaving you with an effective 195 - still massively tanky.

Against Full AP Teams

Magic penetration is even more limited. Void Staff provides 40% magic penetration, and Cryptbloom offers 30% magic pen as an alternative, but again, these compete for the same build slot in practice. Flat magic penetration from Sorcerer's Shoes and Shadowflame helps against low-MR targets but becomes increasingly ineffective as you stack MR. A tank with 250 MR against Void Staff (40% pen) still has an effective 150 MR - that is a 60% damage reduction even after penetration.

The key insight: penetration items are designed to counter moderate resistance stacking, not extreme resistance stacking. When you go all-in on one resistance type, you outscale the penetration options available to your opponents.

Champions That Thrive Against Single-Damage Comps

Best Picks Into Full AD

• Malphite - His Ground Slam (E) deals bonus damage equal to 60% of his total armor. His passive shield scales with max HP. Against full AD, Malphite becomes a wrecking ball who deals increasing damage the tankier he gets.
• Rammus - Gains bonus AD equal to 15% of his bonus armor. His Defensive Ball Curl reflects damage to attackers. Full armor Rammus against a full AD team is one of the most lopsided matchups possible.
• Leona - Eclipse (W) grants bonus armor and MR. Against full AD, the armor portion of her kit doubles in effective value since MR is wasted.
• Taric - His Bastion (W) shares 12% of his armor with a bonded ally. Stacking armor on Taric effectively gives the armor bonus to two champions.

Best Picks Into Full AP

• Galio - His passive deals bonus damage based on MR. His Shield of Durand (W) provides a magic damage shield. Galio into full AP becomes both incredibly tanky and surprisingly dangerous.
• Dr. Mundo - His passive regeneration scaling combined with Spirit Visage makes him nearly impossible to kill with magic damage. His ult heal scaling with max HP means AP poke just gets undone.
• Kassadin - Innate 10% magic damage reduction passive. Can stack MR while still dealing heavy burst damage with his kit. Kassadin into full AP is one of the hardest scaling matchups in the game.

Common Full AD/AP Compositions and How to Exploit Them

The "Assassin Fiesta" - Full AD

You will see this in solo queue: Zed mid, Talon jungle, Riven or Jayce top, Draven or Samira bot, Pyke support. Every single champion is AD. This comp relies on snowballing the early game before opponents can itemize. Your counter: survive to two items. Rush Plated Steelcaps + Frozen Heart on any tank, and the assassins become useless. Their entire game plan is to burst you, and if they cannot do that, they have no plan B.

The "Magic Show" - Full AP

Less common but it happens: Rumble top, Diana jungle, Syndra mid, Ziggs or Karthus bot, Lux or Brand support. This comp has extreme teamfight damage if you group without MR. Your counter: Mercury's Treads first recall, then rush Kaenic Rookern. The magic shield alone absorbs an enormous chunk of their initial burst. Follow up with Force of Nature to become virtually immune to their sustained damage.

The "Four AD + One AP" Trap

The trickier scenario: four AD champions and one AP. Many players are unsure whether to build armor or MR. The answer is almost always to prioritize armor heavily with one flex MR item. Buy Frozen Heart and Randuin's Omen for the four AD threats, and grab Mercury's Treads to handle the lone AP champion. If the single AP threat is fed, consider one dedicated MR item (Kaenic Rookern), but do not sacrifice your armor stack for it.

Quick Reference - Item Priorities

Scenario	Priority 1	Priority 2	Priority 3	Boots
Full AD (tanks)	Frozen Heart	Randuin's Omen	Thornmail / DMP	Plated Steelcaps
Full AD (fighters)	Iceborn Gauntlet	Randuin's Omen	Dead Man's Plate	Plated Steelcaps
Full AD (carries)	Guardian Angel	Plated Steelcaps	-	Plated Steelcaps
Full AP (tanks)	Kaenic Rookern	Force of Nature	Spirit Visage	Mercury's Treads
Full AP (fighters)	Maw of Malmortius	Wit's End	Force of Nature	Mercury's Treads
Full AP (mages)	Banshee's Veil	Mercury's Treads	-	Mercury's Treads

Stop Guessing, Start Counter-Building

The difference between a player who builds the same items every game and one who adapts to the enemy team composition is enormous - often the difference between a 48% and 55% win rate. Against single-damage type compositions, that gap widens even further. A full AD team with no magic damage gives you permission to ignore an entire axis of defense, and the gold efficiency you gain from doing so is one of the strongest advantages available in League of Legends.

The items and priorities in this guide work at every rank, from Iron to Challenger, because the underlying math does not change. Armor reduces physical damage linearly. MR reduces magic damage linearly. And when the enemy gives you the gift of a single damage type, the correct response is to accept that gift and stack accordingly.

If you want to take the guesswork out of counter-building entirely, Hexgate analyzes the enemy team composition in real time and recommends the highest win rate items for your specific game. It handles all the data lookup and matchup math automatically, so you can focus on playing instead of calculating. Invite your friends and earn free Pro access to unlock matchup-specific item recommendations that account for every champion on the enemy team.