The Immortal God of Stuns
 Psyker Build - Warhammer 40k: Darktide 

How to use it:

You should wisely switch between the staff, the sword and the Smite depending on a situation. 

• Use the staff when there are not too many enemies or you need to kill several shooters. Also good for finishing off armored targets, as the staff stuns them and allows your comrades to do their job. Also the staff does an acceptable job of taking down monsters and bosses while still allowing you to be at a safe distance.
• Use the sword when you need to take down a mutant or other tough abomination. Also suitable for clearing out a light horde, it is sometimes faster than the Smite. I will also note that the sword increases your survivability, you can easily block, dodge and eliminate approaching enemies, do not forget to use it, in general.
• And finally the Smite. Use it often, especially against a mixed horde or in a dangerous situation. You can easily stun armored targets and let your team throw grenades or shred them with swords, saving ammo.

Perks:

Warp Charges will allow you to maintain Smite for quite a long time, and the damage from the ability will allow you to filter out everything unnecessary. You will also be able to use the Shield very often, almost without cooldown, thanks to the Warp Charges and the Psykinetic's Aura.

You can also notice that toughness and toughness damage reduction have been maxed out, for survivability, of course. This is perhaps exactly what Psyker lacks, so the build is designed to correct this.

Alternatives:

Feel free to switch some of the talents as you see fit, with Warp Charges, Shield and Smite being the core.

The melee weapon is entirely a matter of taste, just like the staff. One of the curios can also be replaced to increase health, their resistances are optional as well.

Also, the build is not designed for crits at all, but you can fix this by taking the Perfect Timing and the Critical Chance Boost.

The Perilous Combustion was not used, since we will not often kill elites and specialists, but we will help our teammates in this.

Summary:

It’s worth saying that the build is definitely not meta, but in my opinion it gives enjoyable gameplay, increased survivability, and the ability to radically influence the situation by using the Shield and the Smite.

Thank you for your attention, this is my first guide, I really wanted to share it with you!
Praise the Emperor (and Nomanus staff)!