Kill Them All
 Zealot Build - Warhammer 40k: Darktide 

This build essentially has infinite front-line sustain for hordes. As long as you keep your crit abilities up you can activate your charge to get a damage boost and 50% toughness back every 2 or 3 swings into a dense pack. Maulers, and both ragers can get stagger locked by your primary attack if you target the torso with light attacks. 

Crushers can be pretty easily dealt with by activating your evicerator, heavy attacking into the head then activating your charge to lower their armor value to kill them in one hit. You will still have your free +25% damage crit swing available after this, so you can follow up with a revved up heavy attack into the skull of another crusher to take out the majority of its health. Alternatively with the revolver blessings its about 3 crit headshots to kill a crusher. The weakest part about this build is boss fights, but it still commands respectable damage with revved heavies and crits. Bulwarks also cause some issues, but slide dodging around their left side into revved heavies or throwing a stun grenade can solve the issue fairly well.