Hyperfinesse Toxin Terror
 Hive Scum Build - Warhammer 40k: Darktide 

Very explosively high damage build leaning on abusing as much of the class's potential finesse output as much as possible. This creates a feedback loop with Hyper-Violence , as a crit with the appropriate finesse bonuses along with Rampage! , will result in absurd amounts of crit + weakspot damage that ramps up more and more until even crushers will be pressed to survive a crit with enough overkill. 

Hyper-Critical helps with the moments of downtime that will inevitably come with Rampage!, as well as allowing you to circumvent cleave distribution losses, Hyper-Violence feeding into Hyper-Critical 's effect to create breakpoints that will allow instant kills through cleaves that may not normally be possible without it.

Branx MKII Needle Pistol is a great option for guaranteeing kills across longer distances, and the special AOE toxin mode can be used in tandem with Pocket Toxin Blackouts to cause a surge of horde clear with toxin if needed, which will also feed into Sample Collector to get your stimm back much faster. This also allows you to forgo Coated Weaponry entirely, for as long as you know to shoot a few needles and keep the toxin ramped with the Shiv throwing knives, it is very easy to keep the toxin up on targets you need it to, like monstrosities.

If engaging heavier targets, it's wise to try and take out smaller fodder enemies to accumulate overkill that can be transferred over for big damage on them.
 

If you feel the need for better ammo retention, Gunslinger Improved is a good alternative choice for an aura.