The Fireman - Infernus Noospheric Build
 Skitarii Build - Warhammer 40k: Darktide 

Infernus Dual Las Build -  "Trained to put fires out. Turns out I'm much better at the other part."

"Once a Hive brigade firefighter, spent years learning to put fires out. Something in the augmetic process apparently reversed the lesson."

Las Pistol "Nomex Pattern" -  Designated fire-delivery instrument, great for specials and groups of gunners with weak spots. Infernus allows solid boss damage through fire dots that is supported then by Noospheric Command. Somewhere in the reconditioning, 'extinguish' and 'ignite' got filed under the same command string.

Paired Transonics - versatile horde clearer with good crit chances thanks to Shred to feed your ability and Noospheric Command. This is also you backup carapace killer when low on Claws. Light spam can generally work wonders here but the heavies have a lovely cleave that takes full advantage of Perfect Strike. Electro-Strike Conduit is also a very safe choice here with the high crit rate and can open up bulwarks and stun ragers quite reliably. 

Artificer Servo-Skull - Primary recipient of surplus ability charge via Noospheric Commandturning us into ammo-less a special sniper for the team. also provides great boss support with your las pistol to keep those burn DOT's high so fire response times remain exemplary. Power Overload is a little counterintuitive at the start due to rushing Powerdrive so save for later when at max stacks of Static Capacitor Drain. Servoksull is great for melee also as it keeps Progressive Plating Matrix, Superior Defence Engrams Hybrid Combat Covenant and Galvanic Marking Array NEAR constantly. The Purgator Servo-Skull pattern remains a sound alternate designation when chaff-density exceeds standard operating parameters

Chordclaw Strike - an emergency anti Carapace button, Axial Slash is available but generally redundant, as ability charge is prioritized toward Noospheric Command. Try and use a lot at the start of missions to stack Powerdrive as quickly as possible.