Fitz's H40 Optimized Skit - Walking Taser
 Skitarii Build - Warhammer 40k: Darktide 

This is a pretty fun build where you use both your Blitz's and your ability's electrocutions to stun and brittle everything around you and your team, which will be improved with changes to Voltaic Emitter (the brittleness stack got nerfed slightly).

I like running Arc Nades, but if gunners are giving you a hard time, you can use Bubble. Just swap out Moebian Conductor for Voltaic Resistance and take Overcharged Emitter too. The perks of using Bubble is you're far safer in the frontline, can clear entire gunner rooms by yourself, and can revive teammates or physically block shots for them while doing objectives.

You can swap the phosphor for the Galvanic Rifle if you prefer its suppression immunity, though the patch didn't address its low ammo count. Use flak unyielding, Trickshooter Opening Salvo. As for melee, the other shock maul is ok, but the combat knife with uncanny also goes very well with this build and makes you a speedy little clanker.