Full Support Hive Scum
 Hive Scum Build - Warhammer 40k: Darktide 

This is my go to support build, tested on a variety of Havoc40 games to great effect.

Stimm Supply is used to support the team with the Stimm Lab, giving them a little bit of everything. Change the Stimm Lab to whatever you want, but I put what I find best for helping any build in any situation. 25% cooldown regen, 80% toughness regen, -16% damage taken, 16% attack speed, -50% stamina cost and 50% weapon swap speed.

Branx MkVI Needle Pistol is used to kill Elites / Specials, 1-2 hits for most is enough to kill them before they can do any harm, though tankier enemies may require 4+ shots if you need them dead quickly. It can also chunk away at bosses, while weaking bosses Crushers thanks to Targeted Toxin. While Pickpocket and Gunslinger Improved is used to keep your ammo topped up, meaing you should NEVER need to take ammo away from your team.

Catachan Mk I "Devil's Claw" Sword is used to keep yourself alive, letting you solo facetank hordes, Plague Ogryn, Daemonhost, Dreg Rager and Scab Rager with ease just by spamming parry, while still being a generally good melee weapon, able to shred hordes and kill ranged elites / specials if need be, though your main weapon should still be the Branx MkVI Needle Pistol.

Talents such as Toxic Renewal, Tis but a Scratch, Burst of Energy, Precision Violence and Voice of Tertium are used to keep your tougness up, further letting you stay alive and avoid being a burden to your team.

You can swap the perks Loose Formation and Voice of Tertium to whatever you like if you so desire, I can get by just fine without them, but you dropping Loose Formation will prevent you from stretching your teams coherency out far enough to reach the whole team most of the time.

First time adding a build on here, so sorry if the description drags on a bit.