basic purgatus shriek build
 Psyker Build - Warhammer 40k: Darktide 

A very basic purgatus venting shriek build. 

The two extra talent points can be spent on whatever you want, whether it be empathic evasion to remove the need to dodge ranged fire at all while holding down a charged alt fire from the staff, extra toughness, or even kinetic deflection for additional safety while repositioning. Take the stamina curio if you do not take kinetic deflection. Do not take empyric resolve. It is a trap node that will kill your toughness generation and peril generation.

The build revolves around building up to high peril as quickly as possible and utilizing venting shriek to overstack soulblaze, ideally shrieking off cooldown to maximize soulblaze stacking. Normally soulblaze from the staff can only stack up to 16 stacks, but with venting shriek, you can go over the cap up to 31 stacks. 

Your primary method of killing enemies will be the staff. Use the primary fire to stagger ragers and charged alt fires to quickly melt hordes and build soulblaze. If caught out in a bad position, deimos pushes + dodges will allow you to create some space and escape. 

When dealing with a crusher pack, stack soulblaze, then switch to the deimos to build up uncanny stacks. Uncanny retroactively applies to any active DoT stacks that you have applied on enemies and the soulblaze will kill of any elites that the force sword doesn't. Optimal deimos combo for single target is light 1 into heavy 2. Same playstyle applies to monstrosities, though focus on any specials and disablers over the monstrosity. Use brainburst to pick off long distance gunners and snipers.