Hitting an enemy gives them 1-4 stacks of 2.5% Brittleness. Debuff lasts for 5 seconds and can have a maximum of 16 stacks.
3-6 Bleed Stacks on Critical Hit.
6-12% Critical Chance for each Enemy Hit by your previous attack. Stacks 5 times.
Grenade focus build. Gamble for two nades, gamble for 5% grenade chance on elite or special kills. Throw down ammo crate to throw 12 more nades.
Nades give 6 bleed, twin nades go to 12. Shotgun flechette gives 6 bleed and some fire. Fire and bleed ticks apply brittleness buff stacking to 40%
Throw nades and spam special shot on shottie at everything.