Lazy Psyker
 Psyker Build - Warhammer 40k: Darktide 

This is my lazy Psyker build. It's a carry-on over from the older talent tree.

This build can pass you even on Auric Damnation as I use this myself and pass them with a good/decent team. 

This is marked as a support build because it is as such and cannot carry the mission on your own, so play this as a support role, especially if you feel in a lazy mood while gaming. 

1. This build revolves around getting crit chance procs on the Purg Staff to add more stacks and damage to the Boss and Hordes. 
2. Deimos is mostly for clearing the tougher single targets and Purg is for horde clear and general stagger use. Use the special action to charge the sword for the tougher enemies. Hold to use a Heavy hit if you have space to deal even more damage.
3. Brain Rupture is my choice as it helps me pick out the snipers and gunners from afar easier than Assail. Of course, Brain Rupture can be substituted for Assail, if you have a sharp aim and can target the heads of an elite or specialist within a crowd, then I highly recommend Brain Rupture.
4. Shriek is your panic button if you need extra horde clear or accidentally go over the Peril limit.
5. Kinetic Presence may be changed later in future updates. Currently using it for the tree path.
6. Warp Siphon Keystone is important for this build as it reduces your peril generation, which helps with continuous horde clear with the Purg staff. Holding 6 charges with a 4% increase in damage per charge also improves your lethal range on hordes and the total 24% bonus damage will help with tougher enemies.
7. Curios Health perk can be substituted for anything you want. Gunner Resist and Toughness Regen must be on all 3 at Tier 4. I use these Health Curios to increase my survivability and rely on the talent nodes to regenerate toughness. These should increase your survival overall in any mission.
8. I play rearguard with this build, however, you can also play both frontline and rearguard as long as you focus on clearing hordes mostly when ambushes happen.

Final note, builds can only do so much to help you pass, you need to rely on your own skills, playstyle and experience to carry the other portion of the gameplay.