Xavvy's META Assail Purgatus
 Psyker Build - Warhammer 40k: Darktide 

I know what you're going to say already..

A lot of people will look at this build and go wtf? ASSAIL? PURGATUS? ARE YOU DUMB. No. This build stomps. I mean you wouldn't run it in havoc because you need to bring bubble and if you're not the psyker bringing purgatus+bubble then you're a surge psyker bringing the anti ranged output.. but OUTSIDE OF HAVOC.. this is incredibly meta. It absolutely stomps if given the chance in very high pressure fights. the debuffing from purgatus makes assail hit like a fuqqing dumptruck and it helps the teams damage.

Also. fyi this build works incredibly well when combined with another Psyker running the trauma debuff build. It can stack upto 60% between the two psykers, which is just fuqqing fully mental.. literally assail will cleave through crushers. It's seriously a lot of fun.

Umm. back to build information though:

So one thing to mention is the choice of soul drinker. I think this talent is dogshit OUTSIDE OF THIS BUILD.. in this build it's actually mental. Mettle plus soul drinker + soulstealer = insane toughness replenishment like actually legit insane because combined with assail you're getting so many ranged kills that you're generating insane toughness from staff blasting to assail swapping. it does require a fair amount of rapid cast application and then speed casting secondaries to be affective but it's worth it.

One with the Warp is the pro choice here.. you could get rid of of soulstealer or soul drinker if you wanted to and pick up empathic evasion.. I would personally think you are stupid for doing so, so don't tell me about it. The combination of those three toughness replenishment talents is too strong when combined with One with the Warp and I'll explain why. This build just can't afford empathic evasion or it would be chosen but what it does have is the most toughness damage reduction possible in a meta psyker build.. in most cases you will be at 40-50% toughness damage reduction because the smaller 5% toughness dmg reduction nodes are additive and not multiplicative by themselves only stacked with one damage reduction talent. So if you're only using say One with the warp then they just get stacked on with no calculation which puts you at 40-50%+ but.. if you stack all of that with say sanctuary.. then they take a hit from a multiplicative calculation. So yeah you don't really need it between the insane toughness regen this build has + damage reduction combined with max deflection. You can literally block a team of gunners until you safely dodge to cover. Which is why the mark 4 force sword is present.. 

The reason the mark 2 isn't chosen here is because the mark 4 has better anti armour attack patterns to make better use of uncanny since the stunning type force swords are your only option for anti armour out side of debuff/soulblaze. Also the mark 4 is slightly more evasive than the mark 2(the mark 2 has higher overall damage and cleave though but you don't need this with purg+assail).

empowered psionics is a no brainer here. it gives you the ability to delete entire groups of shotgunners/gunners/ragers and if you got stacks already up(which you most likely will).. it can delete several specials quickly for the team. Always remember that the right click on assail is amazing for sniper.. so don't sleep on it(I swear no one uses it and it's very good)

Lastly and most importantly.. creeping flames venting shriek is the best pick here. this is the most dps option of purg builds. Most don't know this but creeping flames 4-6 stacks of soul blaze are seperate entity in the soul blaze stacks.. So if you have 15-16 stacks from your staff already applied this pushes it past the maxium stacking. so with this talent you can get up to 22 stacks ramped up on targets this also makes it incredibly easy to get soul drinker toughness even more regularly.

So yeah.. that's about it. I hope you enjoy this build.