Absolute Valor is our choice of 4th evolution simply because it allows us to have an absolutely RIDICULOUS 50% base crit chance, which, depending on buffs and synergies used, can push this thing to pretty consistent red crits. With a properly built [Tenacious Bond] companion, we can pair that insane crit chance with an equally absurd 9.6x critical damage multiplier. Add armor strip, headshot multipliers, and a heat inherit primer (just cuz we can), and you have one of the most truly absurd primaries in this game.