The Emperors Blessed Laserpointer
 Veteran Build - Warhammer 40k: Darktide 

Veteran after the Balancing from the Depths of the Damned Update can do some absurd Damage, for example the Laspistol just shreds everything now. So try it our as long as they dont nerf it. 

A Tech that also worked before the Update is that you can reach 100% Crit Chance with the Laspistol, making it basically use no Ammo if you pick up the "Shock Trooper" Skill. And after the Buff of "Deadshot", using Stamina while aiming, makes Stamina Management much easier.

 Aura is interchangable, but i just wanted to go zoomies. Pick Ammo Aura for more Ammo sustain, without it you get 6 Ammo per Elite/Special Kill, and with it you get 9 Ammo, so its a notable Buff. Also gives your Team some Ammo Regen. I dont think the Damage Aura is needed. 

Grenades are also interchangable if you wish. I dont recommend Smoke Grenades thought since you want to dodge Ranged Attacks to keep your Crit Chance up. 

Another nice Tipp is to keep like 1 or 2 Trash Melee Enemies around you, so you can dodge their Attacks to also keep your Crit Chance up. Melee Weapon can also be swapped, i recommend a Weapon with high Mobility though, to match the high Mobility of the Laspistol. For Example Duelling Sword or Combat Blade.

One Stamina Curio is also probably more than enough so you could also use another Thoughness Curio for more Survivability.