A Beast and His Dog
 Arbites Build - Warhammer 40k: Darktide 

A remix of my Overzealous Cop builds that makes room for doggo. The goal is an aggressive build that spends most of its time in melee, using Break the Line to throw Elites around for CC and sheer visceral fun. A Combat Axe might work better, but I already have a build for that and the biting flurry of a Tac Axe fits the theme of bestial wrath better. A shotgun felt appropriate for ranged, until I got pinned down by 3 Snipers with Flamers moving in. I like the Infantry Autogun for its fast swap speed, combined with good range and occasional horde-clear, but your secondary is a matter of personal preference. Doggo is there for moral support, extra CC, and spamming Remote Detonation on Crusher/Mauler packs.

This build would take more dog talents like Razor-Jaw Augment, Voltaic Mandibles Augment, Unleashed Brutality, and Serrated Maw, but each of these were underwhelming in practice. I personally think it's hilarious (and effective) to combine Malocator with Targeted Brutality, but you may want to drop the two ability modifiers for something like Street Smarts and Monstrosity Hunter, or maybe Target Neutralised and Efficient Killer. Depending on your comfort level, you could drop True Grit for one of those, or you could take Drive them Back if you need more horde-clear.