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Borderlands 4 Build

Stellar Shock - DoT Harlowe

Harlowe

Flux Generator

End Game

Verified

By AncientRune

Updated on Dec 1, 2025

Dec 1, 2025

Build Overview

This build is all around maximizing the damage of Status Effects which is a meta build archetype. Using the Stellium with the Energy Disc underbarrel for some massive DoT damage. Or just the base Stellium and doing just fine.

Yes this does use Nuclear Winter and Group Study but it's not as important as you would think

Special thanks to the Harlowe theorycrafters for helping me with this build as I know basically nothing about Harlowe. Go to The Soup Kitchen Discord to learn everything about every vault hunter from the top experts

Strengths And Weaknesses

insanely high damage
easy bossing and mobbing

1 gun show. If you don't have the right gun then build doesn't work.

Skill Tree

Points Spent 0 / 49

LMB Allocate

RMB Unallocate

5/5

2/5

3/3

5/5

1/1

5/5

1/5

4/5

Action Skill:

Flux Generator - used mainly for Group Study but Nuclear Winter is also helpful

Nuclear Winter - used for the combo w/ Excited State and proccingEntanglement without relying on Scientist or Runaway Reaction

Group Study - the Gun damage is on shot damage meaning it affects DoTs. Reload speed is also very helpful. I usually only do 1 stack in mobbing and 2 or 3 in bossing.

Green Tree:

Action at a Distance - helps clear speed

Momentum - useful when our DoTs crit

Mass Function - reload speed = dps

Confirmative Reality - insanely good skill but not the best with Stellium but can use other guns for that

Decoherence - damage dealt boosts DoT and bonus element applies to DoT. This is a key skill

Feedback Loop - helps keep up and cycle Action Skill

Runaway Reaction - helps when Action Skill is on cooldown for entangling enemies through all ways of applying DoTs

Excited State - crit damage helps w/ DoT and the guaranteed crit allows for our weapon to ricochet w/ Jakobs part for better clear speed

Distribution Function - useful in mobbing w/ Amp Shields

Accretion - nice extra survivability

Red Tree:

Fuzzy Math - for applying status effects w/ grenade

Elementary - benefit from both bonuses

Great Red DoT - increased DoT duration is amazing for bossing. This is a key skill

Equipment

Weapons

Repkit & Ordnance

Utilities

Gun:

Maliwan Shotgun Stellium - w/ as high damage DoT as possible. Can also roll Energy Disc underbarrel that is SUPREME AT BOSSING. It is A LOT EASIER to kill high HP bosses w/ the underbarrel, but base stellium DoT is still incredibly good. Base stellium is still used for mobbing.

Katagawa's Revenge - used for Confirmative Reality. Shoot 1 or 2 shots on an enemy and will get your action skill back.

Grenade:

Jakobs Grenade Crit Knife - really just for bossing to get crit chance for DoTs. Without it the crit damage boosts doesn't mean much. Otherwise go anything you want.

Tediore Grenade Rad Lingering - try and get w/ Alchemic Augment for higher DoT Chance. Does not have to be a tediore grenade. Ripper will also be nice. Used in mobbing to apply status effects to entangle via Runaway Reaction and/or Nuclear Winter. Then spreads Stellium DoT via Action at a Distance

Repkit:

Triple Bypass - used in combo w/ Now With Caffeine to get back Action Skill faster. Get amp part for bossing. For mobbing any part goes

Class Mod:

Passives to look out for: Damage Dealt, Elemental Damage, Shock/Rad Damage, Status Effect Damage

Scientist - creates a rad DoT based on shock DoT. Shock stellium rolls a very high DoT and Shock Energy Disc is even higher AND hits a lot for multiple DoTs. Get points in Action at a Distance and Ripple Effect

Bio-Robot - personal fun choice for mobbing. Used to get points into Sustained Reaction to keep up Flux Generator longer. Also rolls Confirmative Reality. In vaults it generally lasted for 1 area. Do not need to use this because of Now With Caffeine but its comfy.

Shield:

Guardian Angel - for amp parts and quick recharge. Used for mobbing

Watts 4 Dinner - for amp parts and easy overshield. Used for mobbing

Protean Cell - used for bossing. Bonus element applies to DoTs. Easier to farm than triple amp shields and comparable damage to triple amp and arguably slightly better. You do become a glass cannon so be careful and if you don't like it then just use amp shields

Enhancement:

Passives to look for: Gun Damage and Shotgun damage (On shot so applies to DoTs)

Maliwan Enhancement Primed Potency - 100% status chance after reload which leads to easy DoT application. For Energy Disc you will get guaranteed DoTs if you did not shoot regular mode after reload. Works for both shots.

Firmware

Repkit & Ordnance

Repkit FirmwareAirstrike

Ordnance FirmwareGod Killer

Utilities

Class Mod FirmwareHigh Caliber

Shield FirmwareHigh Caliber

Enhancement FirmwareHigh Caliber

3/3 High Caliber - for the pierce w/ base Stellium. Does not seem to do anything with Energy Discs. Gun damage is on shot so boosts DoTs. Projectile Speed is really nice.