Anti-Corruption Scum
 Hive Scum Build - Warhammer 40k: Darktide 

The main purpose of this build is spamming Stimm Supply every 15 seconds to give your team immunity to corruption and cleanse whatever corruption they already had. This is overkill for most missions, but it makes The Blight Spreads and Pox Gas much less painful to play, so it's a nice swap for those modifiers. Since Stimm Supply will be spammed so much, Booby Trap does a lot of work as well. Ability cooldown is irrelevant in this build because it will never be faster than the 15 second CD of the cartel stimm, which resets the ability CD through Practiced Deployment. You should never manually use your stimm in this build, since that prevents the CD from starting until the stimm buff ends; Stimm Supply starts the stimm CD immediately on use, making it twice as fast to recover.

Melee weapon is open to personal preference. I like Catachan Mk VI Combat Blade because it has good cleaving heavy attacks for horde clear as well as good single-target damage with Hyper-Critical and crit scaling. You can take Flesh Tearer instead of Uncanny Strike strike if you prefer. The knife gets up to 75% crit chance in this build with all buffs active, which also gives a good proc rate on Coated Weaponry for killing ogryns and bosses/monstrosities faster. Applying toxin will trigger Virulent Strain which scales your whole team's damage against the target; this pairs well with Splash Damage to spread the debuff.

Godwyn-Branx Mk VI Bolt Pistol is used for specialist sniping, AoE stagger, and Lethal Proximity which increases the explosion radius of both Boom Bringer and Booby Trap. Puncture is useful for better breakpoints against some targets and extra DPS against bosses/monstrosities.