5-8 Bleed Stacks on Critical Hit.
52.5-60% Weak Spot Damage (Enemies with Bleed Stacks).
10-16% Toughness on Critical Hit Kill.
1-4 Burn Stack(s) on Critical Hit to a maximum of 3-12 Stack(s).
On the Knife, you can swap Manic Damage for Flak Damage, up to youYou can swap Reassuringly Accurate out for whatever you prefer, I just like it for the survivability. Sub Abilities on the Curios doesn't matter too much, but I have found that 1 Health/2 Toughness for main abilities works for me but whatever floats your boat.
This is a variation of the Raking Fire Columnus Autogun build from patch 14 because I played with that a fuck ton and wanted something similar, this is what I came up with in this new Vet tree. Become a whirlwind of violence in a horde and you'll get 10 stacks real quick. The laspistol can melt down big threats to you (Ragers and Bombers) and your team (Gunners and Sniper) even at only 6 stacks.
Infiltrate is still very flexible as a repositioning and toughness regen tool. Personally, I like building for revive support as well but if you want to build more for damage then this also works for that.(Unsure if Exploit and Onslaught don't stack after the changes, but if they don't then Skirmisher should be fine.)[Edit: Fixed Version with Laspistol Perks on it this time]