Best Fighter Build in BG3 — Action Surge & Subclass Guide

Fighter Build at a Glance

Level 1–12 Progression Table

Why Battle Master?

Battle Master is the strongest Fighter subclass in BG3 because Superiority Dice add strategic value on top of every attack instead of just increasing damage numbers. Each die adds a Maneuver effect — Trip Attack knocks an enemy prone (granting Advantage on all melee attacks against them), Precision Attack adds d8 to an attack roll to turn a near-miss into a hit, Riposte lets you counterattack when an enemy misses you.

These Maneuvers create consistent tactical options every single round. A Champion Fighter (critical hit on 19-20 instead of 20 only) deals more theoretical damage but contributes no crowd control. An Eldritch Knight (spell-casting Fighter) has versatility but requires both Intelligence investment and spell slot management. Battle Master requires no secondary resources beyond Superiority Dice, which refresh on a short rest.

Battle Masters get 4 Superiority Dice at level 3, increasing to 5 at level 7. Each die is a d8 (d10 at level 10). With two short rests between long rests, you effectively have 12–15 Maneuver uses per day — enough to use at least one per round in every significant encounter.

Action Surge — The Fighter's Signature Move

Action Surge (Fighter 2) grants one additional Action during your turn, usable once per short rest. This doubles your attacks for that turn — a Level 5 Fighter with Extra Attack normally makes 2 attacks on their Action; with Action Surge they make 4. At Level 11 with three attacks baseline, Action Surge gives 6 swings in a single turn.

The optimal timing for Action Surge is always Turn 1 of any serious boss fight. Using it early ensures the most powerful enemy spends as little time acting as possible. A dead boss doesn't get to use its legendary actions or second phase abilities. Pair Action Surge with Great Weapon Master active and any Advantage source (prone target from Trip Attack, high ground) for maximum damage.

Action Surge resets on a short rest. Always short rest between major encounters to ensure it's available. This is one of the biggest advantages of a Fighter-heavy party — the resource is extremely recoverable compared to spell slots.

Best Battle Master Maneuvers

• Trip Attack: Spends a Superiority Die on a hit to attempt to knock the target prone (STR save). Prone targets grant Advantage on all melee attacks from all sources — incredible team synergy.
• Precision Attack: Spends a Superiority Die to add d8 to one attack roll before seeing if it hits. Use on your highest-damage attack when it would otherwise miss — converts missed attacks into hits.
• Riposte: When a creature misses you with a melee attack, spend a Superiority Die to make a counterattack with d8 added to damage. Outstanding reaction-based damage.
• Commander's Strike: Sacrifice one of your own attacks to allow an ally to use their reaction to make a weapon attack. Excellent for enabling your Rogue's Sneak Attack an extra time per round.
• Goading Attack: Target must pass a WIS save or have Disadvantage on all attacks that don't include you. Excellent tanking maneuver that protects the backline.
• Menacing Attack: On a hit, attempt to Frighten the target (WIS save). Frightened creatures can't move toward you and have Disadvantage on attack rolls — strong AoE denial when combined with Sentinel.

Great Weapon Master vs. Other Feats

Great Weapon Master is the defining feat for two-handed Fighter builds. It has two components: first, when you score a critical hit or kill an enemy with a melee attack, you can make a Bonus Action attack. Second, before each attack you can choose to take a –5 penalty to hit in exchange for +10 damage. The second feature is what makes GWM so powerful — with Advantage (from Trip Attack or Reckless Attack), the –5 penalty barely matters statistically while the +10 damage compounds across all attacks.

Polearm Master complements Great Weapon Master perfectly. It grants a Bonus Action attack with the butt end of a polearm (1d4 + STR, qualifies for GWM's +10 damage on the toggle) and enables Opportunity Attacks when enemies enter your reach — not just when they leave. Combined with Sentinel, this creates a near-impassable zone of control.

Savage Attacker (reroll damage dice and take higher) sounds appealing but is mathematically weaker than GWM. War Caster or Resilient (CON) are good picks for Eldritch Knight or concentration-using Fighter builds. Alert is excellent for high-initiative positioning to ensure Action Surge lands before the enemy acts.

Fighter Subclass Comparison

Verdict: Battle Master is the clear winner for most builds. Eldritch Knight works well in multiclass builds that already invest in INT. Champion is a beginner-friendly option with minimal complexity.

Act 1 Equipment — Best Gear Before Moonrise Towers

Act 2 Equipment — Moonrise Towers and Shadow-Cursed Lands

Act 3 Equipment — Best-in-Slot for Endgame

Common Mistakes Playing Fighter

• Toggling Great Weapon Master on a low-Advantage turn — the −5 to hit eats your damage when you do not also have Bless, Reckless Attack, Tavern Brawler, or Prone applied to the target.
• Forgetting to spend Action Surge before a short rest — it does not stack, so any unused charge is wasted progression value.
• Ignoring Maneuver dice on Battle Master because they 'feel small' — Trip Attack and Riposte cancel enemy turns and routinely save more damage than they deal.
• Sleeping on Polearm Master at level 6 — the bonus-action butt-end attack is a free GWM swing each turn and is the largest single damage jump in the build.
• Multiclassing into Paladin or Barbarian without a plan for short-rest cadence — you trade Indomitable + the 3rd Extra Attack at level 11 for a feature that may not come online in time for the Act you care about.
• Wearing Heavy Armor without 15 STR — you lose 10 ft of movement, which compounds badly with a polearm build that relies on engagement reach.
• Skipping the Adamantine Scale Mail run in Act 1 — its crit-immunity carries through almost all of Act 2 and is the single best mid-game defensive item the Fighter can equip.