Dog Lineman - Fitz's Builds in H40
 Arbites Build - Warhammer 40k: Darktide 

Shock Mines Lone Wolf Arbi has fallen out of favor because 1. mines were nerfed, 2. modifiers that negate mines have been active (Final Toll), and 3. the dog can interrupt things that you can't with shmines, like mutants, dog pounces on yourself, Chaos Spawn grabs by proximity trigger, Daemonhosts with Remote Detonation, and can pin human-sized enemies with annoying modifiers, including Final Toll (red), Contaminated Stims, and Rotten Armor (stinky).

Some comfort can be moved around, but the one hill I'll die on is Rebreather. DO NOT try to be fancy and remove Rebreather. With the amount of tox bombers the AI Director throws at you in a H40 game, you will always wish you had it. Otherwise, you can swap stuff around for 'Shielded Plates' or 'True Grit'.

I suggest this over Lone Wolf in the current environment plus having a dog is wholesome chungus 100 moment. That said, if the things that I mentioned change or you're still on your Lone Wolf alpha sigma grind, swap to Shock Mines. Execution Order is still great without a dog.