Blood for the Blood God
 Psyker Build - Warhammer 40k: Darktide 

You will be keeping peril up by using your Warpshock Slash. Make sure that your warp resistance is as low as possible so each slash increases your peril markedly. At 60 peril resistance you should see your peril jump by around 40 each time you use it. Warpshock Slash is mainly used to keep up stacks but is great in softening up a cluster of adds, great at staggering Ragers, and useful for interrupting gunners as you close the distance. Just don't use it at 100% Peril ;). When you keep your peril as high as possible you gain maximum benefit from this build:  

Warp Rider (20% more damage)  https://darktide.gameslantern.com/abilities/warp-rider

One with the Warp (33% increase to toughness defense), https://darktide.gameslantern.com/abilities/one-with-the-warp

Immaterial Focus (10% damage resist and stun immunity) https://darktide.gameslantern.com/abilities/immaterial-focus

Warp Splitting (100% cleave)https://darktide.gameslantern.com/abilities/warp-splitting

Unstable power (20% strength)

Blitz:  You will most always be at critical peril or close to it so they are mostly useless.

Keep stacks of Disrupt Destiny up and try your best to kill every highlighted enemy in your way. Keeping Disrupt Destiny stacks at 15 most of the time is viable, that will give you : 15% dam, 30% crit damage, 37.5% weak spot dam. After each Disrupt destiny kill you will also gain 25% toughness over 2.5s and 20% movement speed for 2.5s.

Your shield will be used to mostly block specialists. Use this tactically in doorways and in the moment to keep them controlled.

Bosses, you can use your sword but most of the time your Lasgun will burn them down faster using stacks of Infernus (just make sure to aim for the weakspot).

Stats while in the thick of battle:

17-37% crit 

20%-40% increased movement speed

53% - 78% constant Toughness damage reduction.

120% cleave at max peril

60-72% increased melee damage

17%-32% toughness per sec

45% Increased Dam against Crushers & Bulwarks

You are going to feel powerful and will want to run ahead of your team to keep your stacks and momentum up, consequently this will make you the teams frontliner.