Last updated: 19 October 2026

Best Armor Sets in BG3 — Act by Act

Weapons get most of the attention in Baldur's Gate 3 build guides, but armor decides how much punishment your frontliner can actually absorb — and a few sets are strong enough to define a whole playstyle. This runs through the best armor to chase in each act: what it does, roughly where to get it, and who it's for.

01How Armor Class Works With Each Armor Type

Baldur's Gate 3 uses the same three armor categories as D&D 5e, and they interact with Dexterity very differently. Light armor adds your full Dexterity modifier to its base AC, medium armor adds Dexterity but caps the bonus at +2, and heavy armor ignores Dexterity entirely — you get the listed AC and nothing more, but you also don't lose anything if your Dexterity is low. That's why heavy armor favors Strength-based Fighters, Paladins, and Clerics, while light armor scales best on high-Dexterity Rogues, Rangers, and finesse builds.

Armor proficiency also matters: wearing armor you're not proficient with imposes Disadvantage on Strength and Dexterity checks and saving throws, and blocks spellcasting for most classes. A few unique armors (like Helldusk Armour below) waive this requirement entirely, which is part of what makes them valuable outside their raw stats.

02Act 1: Adamantine Splint Armour

The best armor you can have equipped for most of Act 1 is the Adamantine Splint Armour, crafted at the Adamantine Forge in Grymforge (reached through the Underdark). You need a Splint Mould and a piece of Mithral Ore — the mould is looted nearby, and the ore comes from a fight with the Duergar blacksmith Grym, who guards the forge. Feed both into the forge to choose which Adamantine armor piece to create.

Splint Armour lands at AC 18 with no Dexterity bonus (it's heavy armor), reduces all incoming damage by 2 from its Magical Plate property, and prevents attackers from landing critical hits on you at all. Getting hit in melee also inflicts Reeling on the attacker for 3 turns, penalizing their next attacks. The tradeoffs are Disadvantage on Stealth checks and real weight — but for a Strength-based tank who doesn't care about sneaking, it's the strongest armor available for most of the game's first half.

03Act 2: Shadeclinger Armour

Act 2's Shadow-Cursed Lands are built around a darkness mechanic — large areas are Obscured, and several fights and puzzles reward staying hidden in it. Shadeclinger Armour, sold immediately by Quartermaster Talli at the Last Light Inn, is the armor that plays directly into that mechanic: it's light armor (AC 12 + Dexterity modifier), gives +1 to Stealth checks, and grants Advantage on saving throws while you're Obscured.

That saving-throw bonus is what makes it worth equipping over a straight AC upgrade — most of Act 2's dangerous area-of-effect attacks and curses call for a save, and Advantage while hiding in the region's abundant darkness meaningfully reduces how often you fail them. It's cheap, available the moment you reach the Inn, and a clear upgrade for any Dexterity-based character exploring the Shadow-Cursed Lands.

04Act 3: Armour of Persistence

Once you reach the Lower City, Dammon (the same blacksmith companion from Act 1's Tiefling camp, now relocated to the Forge of the Nine) sells the Armour of Persistence — a straightforward heavy-armor upgrade at AC 20 that keeps the same Magical Plate damage reduction as the Adamantine set, and adds Legendary Persistence: a permanent Resistance condition (a +1d4 bonus to saving throws) plus permanent Blade Ward (resistance to bludgeoning, piercing, and slashing damage).

It's heavier and pricier than the Adamantine Splint Armour, but the combination of a higher base AC, physical damage resistance, and a save bonus makes it one of the best all-around heavy armor upgrades before committing to an endgame legendary set.

05Act 3 Endgame: Helldusk Armour

Helldusk Armour is dropped by Raphael after the House of Hope confrontation, and it's widely regarded as the best overall heavy armor in the game. At AC 21, it already beats every other heavy armor on raw numbers, but the real draw is its abilities: a bonus-action Fly ability that recharges on a Long Rest with no concentration required, full Fire resistance with immunity to being set Burning, a further 3 points of damage reduction from all sources, and an Infernal Retribution effect that burns anyone who fails a saving throw against you.

Just as importantly, Helldusk Armour grants automatic proficiency to whoever wears it — meaning even a Wizard or Sorcerer can put it on without being blocked from spellcasting, something no other heavy armor in the game does.

06Act 3: Bhaalist Armour for Piercing Builds

For a Dexterity-based finesse build, Bhaalist Armour is the standout Act 3 light-armor pick. It requires progressing the Dark Urge's or a Durge-adjacent path far enough to become an Unholy Assassin of Bhaal and complete Impress the Murder Tribunal, after which it's sold by Echo of Abazigal at the Murder Tribunal. At AC 14 + Dexterity, its Aura of Murder makes every enemy within 3 meters Vulnerable to Piercing damage (unless they're immune), which is a huge damage multiplier for any rogue, ranger, or thrown-weapon build built around piercing attacks — on top of a flat +2 Initiative bonus from Ambusher.