Unbreakable Flamer
 Psyker Build - Warhammer 40k: Darktide 

This build is meant to be survivable, there is a lot of Damage reduction built into here, Buble helps keep everyone safe and helps you get from a to b without getting gunned down.

Immaterial Focus, One with the Warp and Just a dream are great to keep you alive in dicy situations, this along with grabing your melee weapon and pushing enemies away if you're swarmed, will give you breathing room to claw your way back on top.

Flame staff is great for hordeclearing but when you're in a pinch the great sword will do just as well a job at that, the Flame staf is mainly for supressing enemies for long enough to close in and kill, or help take the heat off your allies, although it will rip through most things a few primary attacks and then build up the secondary to rip thorugh them. Quell speed on the staff to both regain toughness and remove peril.

Biggest problem with this build is fighting in toxic clouds, where your Flamestaff is not that usable without constant quelling. to take out enemies like dogs and trappers quickly and to take out snipers you have brain burst along with kinetic flayer to quickly pop the trappers and dogs when they come in from no-where.

All in all very survivable, just be weary of Pox-gas and get out of it as quickly as can.