Victor's 'Electro Vampire' Shriek
 Psyker Build - Warhammer 40k: Darktide 

A build jumping off the Voidblast staff one, a build using Psychic Vampire to continually gain stacks of Warp Siphon for toughness regen, while constantly spamming scream into the wave basically on cooldown to keep it thinned and burning. This one fit's the theme a bit better, as while the Voidblast staff kinda already deals with everything, the Electro staff does not, but with Shriek and how much peril it generates, you can basically spam it on CD at max peril over and over without issue, resulting in you always having a source of wave clear. 

Other than that, it's just the same sort of deal, spam the Electro staff as much as you can, swap to your Assault chainsword at any point you feel you are getting overwhelmed before your CA is up. I us the chainsword for the sake of the stamina it gives you, and how it's heavy attack string results in pretty good clear without attack speed. Even with low shred it will drop a rager with a chainsaw hit too, so it does everything you need to while you can't quite get another scream/staff charge off. 

The only weakeness for this build is ranged damage due to not using a deflector weapon, but given the amount of Peril and Warp Siphon stack generation you have, I've hardly noticed it. Just quell if you need toughness, you'll get back up to full Peril super quickly.