Terpy's Havoc Ready Rampage! Build
 Hive Scum Build - Warhammer 40k: Darktide 

Terpy's Favorite Havoc Ready Melee Hive Scum Build:

Use the Shivs to constantly stack Toxin Stacks on pretty much EVERYTHING, and use the insane Heavy Attack + Follow Up to 2 shot Crushers While Stimmed Up.

Use the Needle Pistol with UNLIMITED AMMO to eliminate Crushers with 4 shots, regardless of where you hit them. Always keep stacks of this toxin on Bosses.

In order to survive in Auric & Beyond you must dedicate yourself to learning how/when to dodge. This class depends on it. If you go down while trying to learn, that's fine. You need to git gud.

Slides, dodges, and sprinting with your gun out and stamina above 50% make you pretty much invincible if you have a plan and know what you're doing.

The Stimms will have greatly reduced cooldown due to Sample Collector, so the plan is to alternate between Rampage! and the Stimms. You want to keep your Chemical Dependency at max stacks all the time.

Choose Gunslinger if no one else has or you don't have a Survivalist Vet in the party. 

Have fun!