Best Psyker build for Auric and Havoc
 Psyker Build - Warhammer 40k: Darktide 

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Short version: spam half charge right clicks with the staff non stop and only use sword if peril is maxed or to clear unarmored horde. 

This my favorite Psyker build in the entire game, it handles all content in Auric and into Havoc 20 with ease. Its a slow-ish moving high damage output killing machine. Between the crowd control of the staffs shock and the high crit chance of the build, Psyker can handle all the content the game throws at us. I have picked basically every single peril reduction talent we can pick up so the uptime on spells is as much as possible. Max spell uptime is what helps this build be so fun!

Main Damage source is the electrokentic staff, use that on basically every pack you encounter. For most heretics a half charge of the right click ability is all thats needed, only need the full charge up of the right click ability for bosses/bulwarks/crushers. The staff adds an immense amount of crowd control so keeping heretics stunned so you can blast damage or get team support is where this build and staff shines. 

The blaze force greatsword is for block pushing ragers or other heretics that get close AND for clearing small horde monsters, that is why i take the unarmoured damage, to help with horde clear and repositioning. Otherwise its all about staff up time. Also the stam perk can be changed to +crit if you want more up close damage, build the sword for what works best for your playstyle. I find psyker to be slow so taking some extra items to be able to run and position more has been very helpful. Lastly the blessings are there to support easy horde clear, change as needed but these 2 makes the sword feel great into melee. 

Curios are easy, all plus toughness and yes the +stam regen is on there so that i can keep up with how fast people run in most public games. If you run premades with better groups that can be changed for something more useful. Also the toughness regeneration speed is there because I find it helpful staying alive. But for the most part Empathic Evasion + bubble helps keep us alive very well.

Varitions:

This build can also work for flame staff as well, same talents minus maybe moving 1. So if you your in a tighter havoc group and want to use flamestaff, this build also works for that as well. Change out Empathic Evasion for Empyric Shock for the better left click damage on flamestaff.

Dueling sword can also be used instead of blaze force greatsword, it will allow for moving faster and can parry annoying ragers, I just grealty prefer the greatsword for its ease of dealing with a facefull or horde. The dueling sword does kill muties and dogs or trappers easier so dealers choice here.