That weapon got evolutions so below is list of which one to choose
Evolution 1: Incarnon form - By getting some headshots u can transmute to incarnon form
Evolution 2: Rapid wrath - +20% fire rate is always more DPS
Evolution 3: Ready retaliation - On reload from empty: +100% reload speed
Evolution 4: Elemental excess - +20% status chance -10% crit chance (Why less crit chance Mac? its explained in evo 5)
Evolution 5: Devouring attrition - 50% chance to deal +2000% damage on non-critical hits
Disclaimer:
Bane mods increase your total damage output and scales with DoT (damage over time) so you deal +55% on first shot and every next hit of slash dmg is 55% stronger than last one, really good on DoT builds