I got to this build while trying out a combination of crit and status with my [Aklex Prime], you can change [Reflex Draw] with [Pistol Ammo Mutation] or [Lethal Momentum], the exilus slot apparently has a Mudarai polaritybut this builder doesnt point it out. No need for a riven to [Reach] high numbers on those crits, just lots of patience and a bunch of formas. Edited for better performance.