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Borderlands 4 Build

DRONEMANCER | Underbarrel Blood Shot Vex (UVH6)

presentationVex
End Game
Creator
presentationIncarnate
Updated on Dec 22, 2025
Dec 22, 2025

Build Overview

Dronemancer Vex!

37s BLOOMREAPER KILL UVH6 TRUE MODE

This is a build centered around snapshotting on-shot damage boosts like Blood Shot, Amp and some Enhancement boosts into Order AR 'Kill Drone' underbarrels.

This build also doubles down as a serious underbarrel build. With the right setup you can somewhat spam Tasers and use other potent underbarrels, that will benefit greatly from Amp boosts and skill damage access through Blood Shot. This is a seriously potent setup in case the drone memes are not to your liking.

  • The original Dronemancer concept was made and used on Vex by the user Katchenz, and we have since then improved it in all manners we could.
  • The Dronebreaker variant was made by Iserrot, as the result of much testing done by Iserrot, Zee and myself.

A video guide is also available!

Want to snipe and have potent underbarrel access? Check out Blood Fang Vex.

Strengths And Weaknesses

  • Absurd mobbing power
  • Extremely strong bossing due to underbarrel access
  • Underbarrel variety
  • Can massively boost just about any underbarrel shot, making this one of the most effective bossing setups available for Vex
  • Epic rarity weapon requirement for the best drones
  • Bits of downtime if the drone AI doesn't cooperate or if you spam too much

Build Variants

The default Dronemancer skill tree setup.

Boost the damage of many powerful underbarrels to their limits.

Skill Tree

Points Spent 0 / 49
LMB Allocate
RMB Unallocate
Incarnate
5/5
5/5
5/5
5/5
5/5
5/5
1/5
5/5
3/3

Vexcalation

Here we stack up on passive boosts. To that, we add Blood Shot as an on-shot damage boost, which will give our underbarrel shots access to skill damage. They will then get the crit chance from both Target Prescience and Keen Mind.

You can use the Target Prescience points in Vorpal Fiends if you want more potential damage.

Finally, Blood Is Power is added as a Bonus Element that will apply to the underbarrel shots. We further boost it through the lifesteal from Teen Witch, Leeching Attunement and Essence Leech.

Geistwave is available for boss debuffing. For running about and mobbing, use Grave Harvest.

Here Comes Trouble

On this tree, we max Enchantment since it will apply to our gun sources. It also benefits from Blood Shot and our other on-shot boosts. Blood Is Magic provides Bleed and Impact damage.

Equipment

Weapons
Repkit & Ordnance
Utilities

Weapons

The original main loadout here consists of with the Kill Drone Underbarrel, alongside a torgue-licensed part so it nets you access to Torgue Head Ringer for a completely passive on-shot boost.

  • The Goalkeeper AR can spawn with Kill Drones, although it doesn't seem to get Torgue parts. It's still more than enough until you replace it with a perfect purple.
  • Tediore Pistol Attack Drones are just okay and can spawn with torgue-licensed parts. They don't last as long though.

You can and should bring other underbarrel choices with you. The list includes:

Alongside this, you can bring any other good weapon you enjoy using for actual shooting or just dealing with vile crystals, like Balor Jakobs Shotgun, Hot Slugger, Darkbeast, Stray, Piktun Order Sniper and the many other good guns available in the game.

Repkit

Triple Bypass with Amp is the highest consistent Repkit synergy we can get for this, since it's a gigantic on-shot damage boost.

Order Repkit with Amp + Enrage is perfect for bossing. Bleed double dips Enrage's damage boost.

Ordnance

Here you mainly want something to deal with Vile Crystal enemies, or increase bossing damage.

'Crit Knife' Jakobs Grenade is free damage for bossing.

Slippy, Waterfall, Blockbuster, Skully or any other grenade you like.

Heavy Ordnances with high base damage can be alright, since you can Repkit for Blood Shot and open with a high damage shot. A Torgue Heavy Weapon or Maliwan Heavy Weapon are nice for that.

Class Mod

Teen Witch

Provides the most consistent damage boost and protects our Blood Is Power boost.

As for skill rolls, Blood Is Magic (which is actually Skill Damage) gives the most consistency, since it simply passively boosts the damage of Blood Shot.

Grave Thirst can provide bursts of damage through Blood Is Power, however it will fall off on most bosses since this setup does not use Mortal Terror.

Stat rolls to look for are:

  • Kinetic Damage (Bleed double dips this modifier)
  • Skill Damage (Bleed double dips this modifier when using Blood Shot)
  • Skill or Gun Crit Chance (either works, but Skill applies to both the Bleed and the Drones)

Any of these stats are a good roll for this. My preference would be between Skill Crit Chance or Kinetic Damage.

Psion Vex Class Mod

Possibly the best and most consistent for bossing with many of the underbarrel options. Shines even more on bosses that have accessible crit spots depending on the underbarrel you use.

Ideal Skill rolls would be:

  • +5 Bloodletter: +2 Leeching Attunement or +2 Material Components

Stat rolls to look for are:

  • Kinetic Damage or Skill Damage;
  • Status Effect Chance;
  • Skill Crit Chance.

FiredancerVex Class Mod

If you have Groundbreaker on... this can do things. Great choice for bossing in that case.

Ideal Skill rolls would be:

+5 Reverburnations; +2 Fell Inscriptions

Transistor Vex Class Mod

A bit of a gimmicky bossing choice, but cool and effective. The Drones, Tasers, Space Laser and Spread Launchers can trigger Deadwire quite well. A well-rolled version of this class mod is great for many of the underbarrels.

Ideal Skill rolls would be:

  • +5 Deadwire; +2 Target Prescience

Stat rolls to look for are:

  • Kinetic Damage and/or Skill Damage;
  • Skill Crit Chance and/or Gun Crit Chance
  • Status Effect Chance

Shield

Guardian Angel with 150% Amp is the best choice for using Psion or Transistor Class Mods.

Watts 4 Dinner with 150% Amp is the general best for Teen Witch.

Protean Cell is another offensive option, although mostly workable with Teen Witch, unless you're quick enough with the others.

Enhancement

For stat rolls on any enhancement, look for

  • Gun Damage
  • Gun Type Damage
  • Gun / Gun Type Crit Damage
  • Weapon Equip Speed (for ease of use of the Underbarrels)

Head Ringer Torgue Enhancement

  • This is the usual main choice whenever a weapon has a torgue license attached or is torgue-manufactured. The exception usually being when the underbarrel you're using is attached to a Vladof weapon.
  • A Gun Splash Radius or AR Splash Radius roll can be enough radius to instantly destroy the orbs during the first phase of the Bloomreaper using Torgue AR with 'Airstrike', without needing to slot the firmwares that boost radius.

Quintain; Blind Box; Bounce Pass Jakobs Enhancement

  • Spread Launcher.

Dog Movement; Underdog Vladof Enhancement

  • If you want to focus on Tasers, or if the underbarrel you're using is attached to a Vladof weapon.

Firmware

Repkit & Ordnance
Repkit FirmwareDaed-dy O
Ordnance FirmwareDaed-dy O
Utilities
Class Mod FirmwareHigh Caliber
Shield FirmwareHigh Caliber
Enhancement FirmwareDaed-dy O

3/3 Daed-dy O; 2/3 High Caliber or 2/3 Skillcraft

  • Overall strongest firmware setup. Requires a bit of involvement and conscious activation of Daed-dy O's boost, but it is snapshotted and very powerful.
  • Alternatively, swap a tier of High Caliber/Skillcraft for one tier of Airstrike, if you want more radius specifically for the Bloomreaper fight when using the Torgue AR 'Airstrike' underbarrel.

3/3 High Caliber; 2/3 Skillcraft

  • This allows you to shoot through enemies and at the ground with a spread launcher (and any other splash underbarrels that also get the piercing effect) for doubled hits.

2/3 Deadeye; 2/3 High Caliber; 1/3 Skillcraft

  • Completely passive boosts for big damage instances, like Spread Launcher, Big Rocket, Knife Launcher etc.

3/3 Deadeye; 2/3 High Caliber

  • This is an option when using weaponry that can continuously damage a weak spot, like Tasers.
  • A bit niche compared to just using something more generalist, but it's fun.

Specialization

Specialization 1The Best Defense
Specialization 2Riddle You This
Specialization 3A Honed Mind
Specialization 4I Am A Gun

Dronemancer

We’re grabbing everything that will directly or indirectly boost our Blood Shot and underbarrel damage.

The Best Defense; Riddle You This; A Honed Mind; I Am A Gun

  • This is my preferred setup when purely spamming drones. You could slot in Contamination or Bullet Train in place of A Honed Mind if you prefer.

The Best Defense; Contamination; A Honed Mind; In The Zone

  • Great setup for certain underbarrels that you can set up for big hits, like Spread Launcher and Space Laser.

The Best Defense; Contamination; A Honed Mind; Groundbreaker

  • Suddenly, you can melee things because of Groundbreaker. Stack it with the Kill Drones, Spread Launcher, Space Laser or anything else. Deliver through melee attack or slam. Groundbreaker is a skill can and trigger its own bleeds from Bloodletter. Blood Shot into Groundbreaker into Bleed is a natural skill damage triple dip.

Gameplay

Use your Amp Repkit for access to Blood Shot, in combination with your Amp Shield to set up large snapshots into Order AR Kill Drones.

Pace your drone spawns well, so that you don't run out completely and can consistently spawn newers ones as the previous ends. The drones will sort of follow you, so bring them to enemies.

Alternatively, mix in any other underbarrels that have high uptime, like Vladof SMG Tasers and Rooker.

You can also just bring any good gun you like to use and swap back to it after shooting out Kill Drones, Tasers or Rooker.

Use 'Crit Knife' Jakobs Grenade on bosses. Your preference for mobbing. Grenades with high splash radius and damage are useful against vile crystal enemies. A Torgue Heavy Weapon or Maliwan Heavy Weapon are also nice for that.

Changelog

Dec. 20th 2025 - Added Firedancer Vex Class Mod because I forgot.

Dec. 19th 2025 - Added Dronebreaker variant by Iserrot. Writeup updates.

Nov. 4th 2025 - Added Transistor Class Mod option. Pretty good and pretty cool.

Oct. 25th 2025 - Small firmware update for more options.

Oct. 18th 2025 - Added Heavy Ordnance to the gear choices.

Video Guide

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