Victor's 'Vampire Voidblast' Shreik
 Psyker Build - Warhammer 40k: Darktide 

Your 'standard' Voidblast staff build, made to just spam the staff as much as possible and only really swap off of it if the target is too big for it (Monstrosities, or an Ogryn if you knock them to the ground and feel you can stab them). Rending Shockwave to help the team and help Soulblaze do it's work, battle meditation just to help with keeping your Peril from getting to high in-between Shrieks. And then Vampire as it's more consistent when all your damage is from your staff verses soulblaze itself. Lets you spam your Shrieks that much more and get a constant intake of toughness as you do it.  

Executor Diamos is entirely meant to make up the different against Monstrosities, stack it with a empowered hit to the weakspot, then just spam L1 H2 to chunk down anything in front of you. Very useful, as BB is just there as a supplemental ability and shouldn't really be used unless something (like a sniper) is outside of 'poking range'. Kinetic Flayer is an insane help in this build however, nuking specials from full and spreading fire around is fantastic.