Skitarii Zapperinator 9000
 Skitarii Build - Warhammer 40k: Darktide 

*SLAPS BACK OF SKITARIUS*

THIS BAD BOY CAN ZAP SO MANY HERETICS

FAQ:
Q: Why not this or that talent?

A: Power Redistribution Uplink will not be up nearly enough, crits do not benefit this build without this node anyway.
Capacitory Limit Override just slightly increases damage against Crusher, only for the Arc Rifle and nothing more. 
You already ignore most of their armor value after 4 hits with System Shock on the Arc Rifle, and the Arc Maul does not benefit at all basically.
Other talents for weakspots or more toughness generation are simply unnecessary, the gun has no weakspot modifier worth mentioning (except against Monsters), and the toughness generation comes mostly from the weapons rather than the talents.

The gameplay loop is: 

Use ult, unload gun in full auto fire which keeps your toughness up through a lot of incoming attacks, even melee, and destroys any targets without aiming for anything other than center mass.

Once unloaded, if there are still Ogryns, monsters or gunners, you can stay in ult and reload (while reloading ult meter will regen slightly instead), if it's safe to do so ofc, and keep going until ult runs out.

If there are none of those high value targets, switch to melee and activate the special. In the meantime your gun will reload, and when you're out of melee special charges you can switch back again.

Against horde type enemies you can just spam push attacks, it will damage and stagger everything in a cone, killing those weakest enemies in 3 or 4 hits.

Each push attack will consume a charge however, so you don't want to spam it against other tougher enemies who don't die from it, instead use it as an opener and then use heavy attacks to cleave through all of them with extra arcs on top.

Against Ogryns you should use the gun, but you can and should stagger them with the maul special push attack first.