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Borderlands 4 Build

CORROSIVE OVERLOAD Rafa Leveling Build

presentationRafa
Leveling
presentationArc-Knives
Updated on Sep 15, 2025
Sep 15, 2025

Build Overview

This Rafa Leveling Build focuses on using lots of corrosive damage to ramp up Rafa's melee and ranged capabilities. The bulk of the damage comes from Arc-Knives by layering in Corrosive from Altered Cabron and Galvanic Panic. These two will give us tankiness but also bursts of corrosive damage as well as movement speed.

Strengths And Weaknesses

  • Corrosive Damage Powerhouse
  • Extremely fast overdrive
  • Heavy melee focused build
  • Starts slower
  • Big damage cascade at end game
  • Sacrifices some of the cool ranged toys Rafa has

Skill Tree

Points Spent 0 / 49
LMB Allocate
RMB Unallocate
Arc-Knives
4/5
5/5
5/5
5/5
5/5
5/5
5/5
5/5
5/5
5/5

We'll be investing ALL of our points in Arc-Knives, but feel free to remove stuff that fits your playstyle better!

The trick here is to use Arc-Knives and have as much corrosive damage cascade from things such as:

El Borracho which will buff up Arc's Corrosive damage;

Blowout which will cause Corrosive explosions whenever we crit

Altered Cabron which will give us health, but also Corrosive explosions when we gain health namely lifesteal from Saldar;

Lastly, Midnight Oil will give us 5% MORE corrosive damage PER second of our Active skill being up. With Empuje we'll get 31 second up-time for Arc-Knives which should result in 155% more Corrosive Damage. I'm not smart enough to tell you how much more damage Cruel Accrual and El Borracho factors into that, but it's disgusting.

Table of Contents

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