Trauma Surgeon
Build for Darktide

Play aggressively side by side with Zealots and Ogryns. Use Trauma staff(chain light aoe's or fully charged) on all elites/specialiasts as you can make most of them fall flat with even light charges. Fully charged is also good for taking out big groups of shooters as well as clearing hordes. With a good trauma staff, you should be able to do 2 full charges then you can swap to melee and do significant damage with lacerate and flesh tearer to hard to kill enemies that you've fully staggerred like Maulers, Crushers and Ragers. Monsters should be dealt with lacerate on melee, and brainburst/full charged. Spam ult as much as possible as well, particularly in horde situations as it will kill all the trash mobs pretty fast. With block efficiency on curio and dagger, as well as Kinetic Deflection, you can tank revive anyone as well as permanently tank a Daemonhost at Damnation.  Center of the charged blast counts as explosive damage, so even lightly charged blasts will kill Pox Bursters instantly.

I call this Trauma Surgeon specifically because during intense situations, you can always create a room by ulting, THEN using a fully charged blast to delete any non ogryn elite in a horde. If one doesn't kill it, usually the second fully charged blast can, as long as you center it properly. Also, while it's fun to use the Dagger and Trauma Staff, you should always remember you have the option for long ranged kills with the brain burst, or if you need instant toughness regeneration. Snipers/Far off Crushers/Bulwarks should be easy targets to soften up before they get within melee range of your party.