Pathfinder 2e Fighter Build: Greatsword Optimization 1–20
The Pathfinder 2e Fighter is the best martial class in the game. Highest attack proficiency, the only class with Reactive Strike at level 1 without a feat, armor proficiency that scales to Legendary, and a feat list deep enough to support any weapon style. A two-handed greatsword Fighter built correctly is the simplest and most consistent damage dealer in PF2e — and with Versatile Human and the right feat sequence, it’s also one of the strongest.
This guide covers a full level 1–20 greatsword Fighter build, min-maxed from attribute scores through feat selection, with the reasoning behind every choice.
Ancestry: Versatile Human
Versatile Human is the best ancestry for a min-maxed Fighter. The reasons are straightforward:
- Two free attribute boosts at character creation, no restrictions
- One free 1st-level ancestry feat — and that feat is going to be Natural Ambition, which gives you an extra 1st-level class feat
- No forced attribute penalties
- Access to a wide feat pool as you level
Natural Ambition at level 1 means you effectively get two class feats at level 1 instead of one. For a Fighter, whose entire power comes from class feats, this is a significant head start.
Attribute Scores
PF2e uses a boost system. At character creation you get four boosts — two from ancestry (both free as Versatile Human), one from background, one free — plus four more during level creation. You then get four boosts at levels 5, 10, 15, and 20.
Starting attribute priority: STR > CON > WIS > DEX > INT > CHA
| Attribute | Starting Score | Reasoning |
|---|---|---|
| Strength | 18 | Key attribute. Every +1 is +1 to attack and damage. Max this first always. |
| Constitution | 16 | Hit points and Fortitude saves. Fighters take hits — you need this high. |
| Wisdom | 14 | Will saves are the Fighter’s biggest gap. Don’t dump this. |
| Dexterity | 12 | Reflex saves and initiative. Full Plate caps DEX bonus to AC at +0 so don’t over-invest. |
| Intelligence | 10 | Skills. You don’t need many. |
| Charisma | 8 | Dump stat unless you build for Intimidation — this build doesn’t. |
Background: Take Warrior or Martial Disciple — both boost STR or CON and give Athletics or Acrobatics training, which is exactly what this build wants.
Attribute Boosts by Level
At each boost milestone, prioritize:
- Level 5: STR to 20 (if not already capped), CON, WIS, DEX
- Level 10: STR (if applicable), CON, WIS, DEX
- Level 15: Same priority
- Level 20: Same priority — STR and CON should both be 22+ by endgame
Armor: Full Plate
Full Plate is the correct armor for this build. The DEX cap of +0 means your Dexterity score doesn’t contribute to AC — which frees you from needing to invest heavily in DEX. The Bulwark trait on Full Plate replaces your DEX modifier on Reflex saves, which partially compensates for your low DEX investment.
Upgrade your Full Plate as magic items become available. +1 Full Plate at level 5 and +2 Full Plate at level 11 are the benchmarks.
Weapon: Greatsword
The Greatsword is a 1d12 Versatile (P) sword. In PF2e, the Greatsword’s strengths are:
- Largest standard damage die at d12
- Versatile (Piercing) — lets you switch between Slashing and Piercing damage to bypass resistances
- Sword group — unlocks Critical Specialization: Sword, which forces a Frightened condition on a critical hit
The Greatsword lacks traits like Forceful or Backswing that some two-handed weapons have, but a d12 with Versatile is clean and reliable. The critical specialization applies Frightened 1 on a crit, which is a meaningful debuff at no action cost.
Magic weapon progression:
- Level 2: +1 Striking Greatsword — adds a second damage die (2d12)
- Level 10: +2 Greater Striking Greatsword — adds a third die (3d12)
- Level 16: +3 Major Striking Greatsword — adds a fourth die (4d12)
Rune selection priority: Striking runes first, then weapon potency runes for the attack bonus, then damage runes. A Flaming or Keen rune at higher levels adds significant value — Keen lowers your critical threat range from natural 20 to natural 19, which stacks devastatingly well with the Fighter’s high proficiency.
Skills
Take Athletics as your primary skill — it governs Trip, Shove, and Grapple, all of which synergize with fighter class feats. Maximize Athletics to Legendary.
Secondary skill: Intimidation if you want to pick up Demoralize for action economy, or Medicine for out-of-combat utility.
Full Feat Progression: Levels 1–20
This is the core of the build. Every level that grants a class feat is listed with the choice and the reasoning.
Level 1
Class Feat 1 (Natural Ambition bonus): Power Attack Power Attack is a 2-action activity that makes a Strike with extra damage — specifically, one extra damage die. At level 1 with a 1d12 Greatsword and 2 actions spent, you’re dealing 2d12 + STR damage on a single attack that counts as one MAP increment. This is your bread and butter turn structure for the first several levels.
Class Feat 2 (standard): Reactive Strike Wait — Reactive Strike is a class feature, not a feat, at level 1 for Fighters. It’s automatic.
Corrected Level 1 Class Feat (standard): Aggressive Block or Brutish Shove Since Reactive Strike is free, your Natural Ambition feat goes to Power Attack, and your standard class feat should be Brutish Shove. When you succeed on a Strike with a two-handed weapon, you can attempt to Shove the target as a free action — no action cost. This adds forced repositioning to your damage output without spending any of your three actions on it.
Ancestry Feat: Natural Ambition (used to get Power Attack as above)
General Feat: Toughness — bonus hit points equal to your level. Fighters are the front line. You want every HP you can get.
Skill Feat: Titan Wrestler — lets you Trip and Shove creatures up to two sizes larger than you. This matters because many high-level enemies are Large or Huge.
Level 2
Class Feat: Dueling Riposte — After a successful Reactive Strike, you can make a free Strike. No — this doesn’t fit this build well.
Class Feat: Swipe — Make a single Strike that hits all creatures within your reach in a 90-degree arc, rolling once and comparing to each creature’s AC. On a standard turn: Power Attack into a cluster, then Swipe the rest. Excellent for multi-enemy encounters.
Skill Feat: Intimidating Glare — Demoralize without the language requirement. Useful when you have a free third action.
Level 3
Skill Increase: Athletics to Expert.
General Feat: Fleet — +5 feet to Speed. Full Plate reduces your speed by 10 feet. Fleet partially compensates and keeps you mobile.
Skill Feat: Assurance (Athletics) — lets you take 10 + proficiency on Athletics checks without rolling. Useful for guaranteed Trips against lower-level enemies late in a turn at MAP.
Level 4
Class Feat: Knockdown — When you succeed on a Trip combat maneuver, you can immediately follow with a Strike as a free action against the Tripped target. Trip + free Strike is a significant action economy bonus. Tripped targets are Flat-Footed (−2 AC), so your follow-up Strike hits more often.
Skill Feat: Continual Recovery or Robust Recovery if Medicine is trained, or another Athletics skill feat.
Level 5
Fighter Weapon Mastery: Choose the Sword group. Your proficiency with Swords (including the Greatsword) advances to Master, which is +2 to attack rolls on top of your already-high Fighter proficiency. This is when crits start happening consistently.
Attribute Boosts: STR, CON, WIS, DEX.
Ancestry Feat: Adapted Cantrip or Multitalented — or take Cooperative Nature for a +4 to Aid checks if your table uses the Aid action heavily. Otherwise take Unconventional Weaponry if there’s a weapon that interests you, or Heroic Presence for a defensive boost.
Class Feat: Furious Focus — When you use Power Attack, it doesn’t count as two attacks for the purposes of MAP on the same turn. This means Power Attack + Strike is now Power Attack (no MAP) + Strike (−5 MAP) instead of the usual Power Attack (no MAP on itself but the follow-up Strike was at −5 anyway). Wait — let’s be precise: Power Attack is a 2-action Strike that counts as one attack for MAP. Your third action’s Strike is at −5 regardless. Furious Focus is most useful for builds using Power Attack as part of an Extra Attack flow. At this level it refines the turn structure.
Skill Feat: Terrified Retreat — forces enemies to flee on a critical failure against your Demoralize.
Level 6
Class Feat: Combat Reflexes — gain an additional Reactive Strike per round. Now you can punish two creatures per round for triggering your Reactive Strike condition. With a Greatsword and reach options or simply being in a tight corridor, this punishes enemy positioning repeatedly.
Skill Feat: Intimidating Prowess — add STR modifier to Demoralize if your STR exceeds your CHA by 4 or more. With STR 20+ and CHA 8, this is a guaranteed +6 or more to Demoralize checks.
Level 7
Skill Increase: Athletics to Master.
Weapon Legend: At level 13, your sword proficiency advances to Legendary (covered below). At level 7, your non-sword weapon proficiencies advance to Expert — irrelevant for this build.
Battlefield Surveyor: +2 to Perception for initiative. You go first more often.
General Feat: Incredible Initiative (does not stack with Battlefield Surveyor per the text) — skip this. Take Ancestral Paragon for an extra ancestry feat if available, or Diehard to survive at negative HP.
Class Feat: Swipe (if not taken at level 2) or Whirlwind Strike preview — take Positioning Strike here: on a hit, move the target 10 feet into a position you choose (within reach). No save. This is displacement without spending an action on Shove.
Level 8
Class Feat: Devastating Strike — Increase the number of weapon damage dice by 1 when you Strike. A Greater Striking greatsword normally rolls 3d12. With Devastating Strike it rolls 4d12. Combined with Power Attack this is massive burst damage.
Skill Feat: Battle Cry — you Demoralize as a free action when you roll initiative. Start every fight with an enemy at Frightened 1 at zero action cost.
Level 9
Combat Flexibility: You gain a bonus class feat of 8th level or lower that you can change every day. This is one of the best Fighter class features — essentially free daily feat swapping from your entire class feat list up to level 8. Use it to pull in situational feats you wouldn’t permanently take.
Skill Increase: Athletics to Legendary.
Class Feat: Improved Knockdown — You no longer need to succeed on a separate Athletics check to Trip. When you use Knockdown, the target is automatically knocked Prone without a check. This converts a conditional Trip into a guaranteed Prone plus a free Strike. Devastating.
Level 10
Attribute Boosts: STR, CON, WIS, DEX.
Ancestry Feat: Extra ancestry feat — take Unconventional Weaponry or a defensive option.
Class Feat: Whirlwind Strike — Make one Strike against every enemy within your reach, rolling once and comparing to each AC. Unlike Swipe (90-degree arc), Whirlwind Strike is a full 360. This costs 3 actions and is the premier multi-target option in the Fighter’s toolkit. Save it for turns where multiple enemies are adjacent.
Skill Feat: Scare to Death — spend 1 action, target makes a Will save. On a critical failure, the target dies. On a failure, the target is Fleeing and Frightened 4. This is not a meme at high levels — Fighter WIS is decent enough to make this land on lower-level enemies.
Level 11
Skill Feat: Quick Repair if using shields as backup, or Practiced Defender.
Class Feat: Stance: Assailant’s Burden or Brutal Finish — Brutal Finish: Your last action of the turn becomes a Strike that deals maximum damage instead of rolling. If you’re going to make a third attack at −10, making it deal max dice instead of rolling averages up your floor significantly. At 4d12 + STR with Devastating Strike, maximum damage is substantial.
Level 12
Class Feat: Vicious Swing — Make a 2-action Strike that deals double damage on the first damage die. Combined with Power Attack (which adds an extra die) and Greater Striking (3d12 base), this creates massive single-target burst.
Note: Vicious Swing and Power Attack are both 2-action Strikes with the Flourish trait. You can’t use both on the same turn. Alternate them based on whether you want consistent extra dice (Power Attack) or exploded first die (Vicious Swing). At this point your Combat Flexibility lets you swap between them daily based on expected encounter type.
Level 13
Weapon Legend: Your Sword proficiency advances to Legendary. This is the highest attack bonus in the game. At level 13, a Legendary Fighter with STR 22 and a +2 Greater Striking Greatsword is attacking at +26 or higher on the first Strike. Enemies at this level have AC in the mid-30s, so you’re hitting on a 9 or better. Crits happen on 19s and 20s with a Keen rune.
Class Feat: Determination — Once per day, remove one non-permanent harmful condition. Emergency resilience for critical conditions like Frightened, Confused, or Slowed.
Level 14
Class Feat: Shatter Defenses — Whenever you critically hit a Frightened creature, that creature is Flat-Footed until the start of your next turn. Combined with Battle Cry (Frightened on initiative), Demoralize, and the Greatsword’s Critical Specialization (Frightened 1 on any crit), you can maintain a feedback loop: Frighten → Crit more easily (Frightened reduces saves/checks but not AC directly) → Crit with sword → Apply Frightened again → repeat.
Level 15
Attribute Boosts: STR, CON, WIS, DEX.
Improved Flexibility: A second bonus class feat from Combat Flexibility. Now you have two daily-swappable feats from your entire class feat list up to level 14. Your build’s flexibility reaches its ceiling here.
Ancestry Feat: Heroic Presence or another defensive option.
Class Feat: Boundless Reprisals — You gain an additional reaction each round, specifically for reactions. Since Reactive Strike and Combat Reflexes already consume reactions, this lets you respond to more triggers per round.
Skill Feat: Legendary Athlete (if Athletics is Legendary) — ignore difficult terrain from mundane obstacles.
Level 16
Class Feat: Weapon Surge — Once per round, after making a Strike, you can make an additional Strike against the same target as a free action. Effectively one free Strike per turn. The action economy here is extraordinary — you’ve just added an attack without spending an action.
Level 17
Class Feat: Smashing Poison or Multishot Stance (irrelevant for melee) — Take Fearsome Brute here: when you damage a Frightened creature, that creature takes additional damage equal to the Frightened value. Frightened 2 means +2 damage per hit — modest but consistent, and it stacks.
Level 18
Class Feat: Overwhelming Blow — Your Power Attack now deals maximum damage on the added die. The extra die from Power Attack is always maximum. Combined with Greater Striking’s multiple dice, this consistently removes a variable from your damage calculation in your favor.
Level 19
Class Feat: Savage Critical — On a critical hit, you deal 3 extra damage dice instead of the usual doubling. At 4d12 base, a normal critical doubles to 8d12. With Savage Critical it’s 4d12 + (4d12 × 3) = significant additional damage. This redefines what a Fighter crit looks like at level 19.
Level 20
Attribute Boosts: STR, CON, WIS, DEX.
Ancestry Feat: Final defensive or utility option.
Class Feat: Impossible Volley (ranged only — skip) — Take Unstoppable Juggernaut: when you critically succeed on a save against an incapacitating effect, you’re unaffected. Hard counter to the most dangerous crowd control at high levels.
Turn Structure Summary
Standard offensive turn (no movement needed): Power Attack (2 actions) → Strike (1 action, −5 MAP)
Multi-enemy turn: Swipe (2 actions) → Strike or Demoralize (1 action)
Single big target: Vicious Swing (2 actions) → Strike (1 action, −5 MAP)
Repositioning turn: Stride (1 action) → Power Attack (2 actions)
Full clear turn (level 10+): Whirlwind Strike (3 actions) — hits every adjacent enemy
Damage at Key Levels
| Level | Weapon Dice | Power Attack Dice | STR Bonus | Average Turn Damage (2 attacks) |
|---|---|---|---|---|
| 1 | 1d12 | +1d12 | +4 | ~25 |
| 5 | 2d12 | +1d12 | +5 | ~45 |
| 10 | 3d12 | +1d12 | +6 | ~72 |
| 16 | 4d12 | +1d12 | +6 | ~95 |
| 20 | 4d12 | +1d12 | +6 | ~110+ (with Savage Critical procs) |
These are conservative estimates on a standard two-attack turn. Improved Knockdown adding a free Strike, Weapon Surge adding a free Strike, and critical hits with Savage Critical will push these numbers significantly higher in actual play.
Bottom Line
The Pathfinder 2e greatsword Fighter is a masterclass in consistent, scalable damage with meaningful tactical decisions every turn. Versatile Human’s Natural Ambition front-loads the build with Power Attack at level 1, Brutish Shove adds free repositioning on hits, and the feat progression through Knockdown, Improved Knockdown, Weapon Surge, and Savage Critical turns each turn into a high-damage, condition-stacking threat that only gets more dangerous as levels increase. The three-action economy rewards you for knowing when to Power Attack, when to Swipe, and when to spend your third action on a utility play — and this build gives you the tools to make the right call every round.