5-8 Bleed Stacks on Critical Hit.
12.5-20% Critical Chance for 6s on successful Dodge.
Killing an enemy by firing both barrels makes your next Reload 40-70% faster.
6-12% Critical Chance for each Enemy Hit by your previous attack. Stacks 5 times.
Three things to note :There is many reliable way to modify this build without stealth or witth Smoke instead of Krak, but you SHOULD take Agile Engagment with this weapon combination, easiest +25% of damage IN THE GAME and the swap between Shotgun and Knife is instantaneous.The second thing to note is, a Vet without Iron will, Close order Drill and Confirmed kill will ALWAYS be worst than a one with other perks instead, these 3 perks should ALWAYS be in your build if you want to have any capacity to resist enough time to do your damage. Now you know.This shotgun is MADE for Weapon specialist, you will have a hard time using this shotgun with the tother 2 keystone with half the efficiency. But I suggest you to try if you want to lose time.The strategy : Very simple, you rush with a knife, get one kill, swap, kill a guy (or many) with a shotgun, swap, mêlée for 5 sec until you lose all your attack speed bonus and Damage bonus, swap, shotgun, etc etc.Dont hésitate to use the alt fire (shooting two ammo) when you can for triggerinf the blessings Both barrels (it stay active until next reload, even if you replenish ammo with Always Prepapred by killing in mêlée)When you are in difficulty, use your ultimate for repositioning.When bulwark, use krak grenade, easy solution.if too many bulwark, you still gain grenades on Elite and Special lkill, sooooo... Try to not rush it. Either count on your teammates for doing something or take your time using the mobility and lethality of the knife and shooting everything else with the shotgun. Trust me, horde clear is always useful, for you, or for the tranquility of your teammatesTo be clear : This Shotgun is notmeant for Killing Mauler and bulwark or Boss. Its for specialist, and Aggressive clear of everything that is close to you. You replenish ammo in you barrel by killing one dude. then you swap, you shot, take back the knife, and repeat. You can clear hordes very fast with this. Occasionnaly blasting ragers with a doubble barreled shot feels also pretty good. The rest, you kill with the most OP weapon of all, the knife aka Catachan MK III combat blade.