The Arc Raider - Lightning Maul Melee Build
 Skitarii Build - Warhammer 40k: Darktide 

Flensing Melee Refraction Build - "That belongs in a museum!"

Once a line Skitarii, now a relic hunter for a fringe order of the Mechanicus. Temples, vaults, or forgotten manufactorums. If it’s still intact, he will walk in and take it.

The Arc Maul - Your tool of Recovery and to brutalize any heretics in the way  Flensing Protocols goes hand in hand with this weapon due to its weight and slow swing speed, with the extra crit helping to proc Electro-Strike Conduit. In empowered mode, time it with Voltaic Emitter so the arcs spread cleanly across a group, for some wombo combo damage. 

Phosphor Blast Pistol - A relic itself and your designated specialist response weapon, and the primary source of sustained boss damage through stacking Infernus. When the heretic starts swinging the big sword and showing off, just shoot him.

Voltaic Emitter - Not only a stun but also a damage dealer with Voltaic Arcs and a buff to your maul with Voltaic Motivator. Excellent setup against large groups, and it plays cleanly with any lightning buffs the rest of the squad is carrying. The Voltaic Arcs also play well with System Shock to stack brittleness into entire groups of crushers, turning them into an easy kill for your Maul and meaning Thunderous is overkill with the amount of carapace nowadays. 

Integrated Refraction Emitter - The Omnissiah's own grace, rendered cooldown-only by decree Sacred Fatsharks most recent revision. Reliable for revives, and for weathering pressure from gunners and Reapers alike. In melee, it earns its keep too, delivering three electrocution shocks across twelve seconds.  A baby Voltaic Emitter running its own cooldown and actively helping said cooldown thanks to Kinetic Repulsion!