Gandalf's 'Scriers Voidblast' Warp Siphon
 Psyker Build - Warhammer 40k: Darktide 

A build simply meant to pair the Voidblast staff with Scriers, and create a crit build of sorts. I ended up going for Warp Siphon on this one, as unlike the Inferno Staff build, this one very largely needs Solidity to keep Scriers up for any length of time, so it felt better to get Warp stacks instead even if I couldn't have a chance at getting them off everyone's kills. I also didn't see much help in Kinetic Deflector or True Aim for this particular build, as you spam Trauma staff hits regardless, if it crits that's just a bonus, verses with the Inferno build where in the crits directly lead into more burn. (as 1 crit on the Inferno staff's alt fire turns into 6 burn stacks, verses the Voidblast staff which just gets one slam down). 

the 'Blazing' Voidblast build makes better use out of it anyway, this one gets better use out of being able to keep scriers up 100% of the time so that you don't explode as much. The extra toughness regen is very helpful and useful too. Beyond that, just slam the ground and get as many crits as you can, while blowing everything away. And hoping Warp unbound actually works...