Best Borderlands 4 Vex build

Borderlands 4’s Vex build lets you stack bleed damage and sustain Incarnate with the right setup, turning her into one of the strongest Vault Hunters in both solo and co-op.

Borderlands 4 gives you four Vault Hunters to pick from. Amon leans into melee, Rafa is all heavy firepower, and Harlowe mixes precision with control. And though the best weapons play a big role in everyone’s performance, Vex is a great character to pick.

Vex stands out for her versatility. Her Phase Covenant lets her adapt to any situation by changing her element on the fly, and her minions keep enemies busy while she picks her shots.

So, if you’ve sifted through Amon, Rafa, and Harlowe and decided on the Siren herself, you’re in the right place. Here’s the best build for Vex in Borderlands 4.

Gearbox

Best Vex build

The best Vex build focuses on stacking bleed damage and maintaining a high fire rate. Pairing the Whiskey Foxtrot AR with Bloodletter allows you to trigger kill skills instantly, keep Incarnate active for most encounters, and stay alive even against UVH5 bosses.

• Best skills: Grave Sites, Grave Implements, Grave Power, Bloodletter, Drink Full, Mortal Terror, Grave Vitality, Essence Leech, Bloodis Power, Heartpiercer, Guns and Needles
• Best Action Skill for solo and co-op: Incarnate (Heartpiercer)
• Capstone: Heartpiercer (Incarnate build)
• Weapon type: Whiskey Foxtrot or any high fire rate AR with strong per-bullet damage, Ripper licensed magazine, and ideally scrap cannon underbarrel. Backup with a strong SMG in case AR ammo runs out.

Best skills to choose

Action Skill: Incarnate

Incarnate with Heartpiercer is the strongest Vex setup because it transforms her into a nonstop damage dealer that shreds mobs and bosses.

The whole build is designed around kill skills like Grave Sites and Grave Implements, which stack crit damage and raw gun power every time you get a kill. With Mortal Terror, even body shots can trigger all your kill skills at once, and with the Whiskey Foxtrot’s crazy fire rate, those stacks climb instantly.

Bloodletter pushes bleed scaling through the roof, while Essence Leech and Grave Vitality make you nearly unkillable. It’s the perfect mix of infinite fire, sustain, and raw damage.

Gearbox

To find the skill you want, type it into the filter under skill to uncover whether it’s a good one to invest in and how many points you should put into it.

Best Capstone

For the current bleed/incarnate setup, Heartpiercer is the defining capstone.

Heartpiercer is the go-to Capstone since it fires piercing waves that boost damage and restore ammo when combined with Witchy Trigger Finger. It turns Incarnate into a nonstop bullet hose that shreds bosses and mobs alike.

Other capstones like Unsealed, Heirloom, or Grim Reaper still work for older pet-focused builds, but Heartpiercer is the defining choice for the top solo and co-op bleed build.

Weapon type

This build revolves around the Whiskey Foxtrot assault rifle, a rapid-fire AR capable of firing nearly 20 rounds per second while dealing strong damage with each shot.

Aim for rolls with Ripper licensed magazine and scrap cannon underbarrel. Status effect chance, crit damage, and magazine size are key. Backup with a strong SMG if you run dry on AR ammo.

Gearbox

How to play Vex

Vex is a versatile Siren who works best with adaptable players. Here’s the rotation I’ve found works best with her:

1. Throw a knife with the Penetrator augment to start bleed crits.
2. Pop rep kit to get a damage buff and reduce incarnate cooldown.
3. Enter incarnate, hold fire with Whiskey Foxtrot, and let Mortal terror trigger kill skills automatically.
4. Manage magazine size so you never fully empty it, keeping infinite fire rolling.
5. Heartpiercer waves add damage and instantly refill ammo if they hit.
6. Lifesteal and Grave vitality let you face-tank bosses without dodging mechanics.

So, that’s all you need to know about how to build the perfect Vex in Borderlands 4. While exploring Kairos, check out the Maurice Vending Machine location, Wildcard missions, upcoming roadmap, the best settings, and how to get some free rewards through the Twitch Drops and SHiFT codes.