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Borderlands 4 Build

Ham Slamwich - UVH5 Hammer Slam Amon

Amon

Onslaughter

End Game

Verified

By AncientRune

Updated on Nov 19, 2025

Nov 19, 2025

Build Overview

This build is all around spamming Molten Roil for HUGE slams which is so much fun. WIth the power of DAMAGE FORMULA you can TRIPLE DIP your damage with INSANE dots from Raging Inferno

DISCLAIMER: this build cannot clear all content. The game was not designed well with Molten Slam in mind with flying enemies and just enemies with weird hit boxes. So this is more of a for fun build than anything BUT uses the same gear as other action skill Amon builds meaning you will probably have the gear or will use the gear on other things anyways

Strengths And Weaknesses

INCREDIBLY FUN
Great Survivability
Great mobbing
Does great for bossing when it does work

Bosses limited to stuff Moltem Slam can hit and do enough damage to (armor bars like Radix don't do well)
Sometimes weird with hit boxes
Very gear specific

Skill Tree

Points Spent 0 / 49

LMB Allocate

RMB Unallocate

5/5

1/3

5/5

1/1

1/5

5/5

1/1

Action Skill:

Onslaughter - used for melee damage to ONE PUNCH ENEMIES with the Raging Inferno DoT. Great filler in between slams and counts as melee attack for Fists of Stone

Pyroclast - great for mobbing as it keeps up our action skill.

Thermal Diffusion - used for bossing with a high capacity shield if you want to use Onslaughter for damage in bossing. The damage boost is additive with base onslaughter damage before the damage formula is applied making it VERY STRONG.

Fellfrost- solid mobbing damage. Although converted to fire because of Furnace effect.

Molten Roil - the pyre itself is a DOUBLE DIP making it extremely good and a MUST HAVE capstone for this build.

Red Tree:

Discombobulate - increased crit chance for more Raging Inferno procs

What Burns Within - triple dips from Molten Roil slam to the Pyre to Raging Inferno

Gut Punch - Damage boost that triple dips

Tritanium Knuckles - damage boost double dips in Molten Roil

Forged In Steel - Immunity to damage which helps survivability. Especially in bossing. Cannot spam forge skill enough for permanent uptime but it's nice when it does happen

The Best Defense - Overshield for survivability. Can get more points from Tritanium Knuckles if you have survivability issues.

Catastrophe - Increased crit chance for proccing Raging Inferno. Shock part kept up from Electrical Fire DoT.

Fists of Stone - Using Slippy to keep up. With Protean Cell or Watts 4 Dinner you can double the procs. This is a key skill

Electrical Fire - Take our Raging Inferno and divide it by 50% and have a triple dipped shock dot. Allowing us to easily cover shielded enemies. This skill itself does not triple dip but if using a triple dipping skill it takes that base damage. Not the best uptime though as the base slam can proc Raging Inferno which would then activate Electrical Fire and then go on cooldown which means its only a double dip and not a triple dip. This is a key skill

Green Tree:

Executioner - crit damage applies to Raging Inferno

Destruction Engine - forge skill damage double dips in Molten Roil. Replace with Gathering Storm if using this build in mainly mobbing activities.

Equipment

Weapons

Repkit & Ordnance

Utilities

Guns:

You will want to hold any splash weapon to benefit from the gun splash damage bonus on your Enhancement. When holding a splash gun and having gun splash damage it will act as all damage dealt. Making it an excellent stat stick. I go with the Stellium which is a high DoT Maliwan Shotgun which is easy to use with the Primed Potency Enhancement. Solid to shoot with mobbing

Jakobs Pistol Vial Launcher Underbarrel - This damage boost is great for min maxing. You can shoot the vial at the enemy then swap to the splash gun.

Ordnance:

Slippy - procs Fists of Stone and Gut Punch. Get points with +1 charge

Shield:

Protean Cell - go to for bossing as the bonus element applies to Raging Inferno and counts as stored damage which will help boost our base damage of the Molten Roil pyre which leads to a stronger Raging Inferno triple dip. Will also double Fists of Stone procs making it extremely good for spam.

Firewerks - great for mobbing.

Watts 4 Dinner - decent bonus element and survivability during mobbing. Bonus element counts for stored damage and doubles Fists of Stone procs

Order Energy Shield Triple Turtle - Highest possible shield capacity found is around 65k. This is for Thermal Diffusion

Class Mod:

Melee Crit Chance or Skill Crit Chance is VERY noticeable and helpful as a passive. Gives consistency for DoTs which I prefer over basic soup damage boosts.

Furnace - points in Raging Inferno for double dipping dot. Paired with Molten Roil it's a TRIPLE DIPPING DOT.