Give me carpal tunnel NOW please (Martyrdom Zealot Build)
 Zealot Build - Warhammer 40k: Darktide 

EDIT 1: This build has been updated slightly - Swapped blessings and perks on the combat blade and changed over from the bolt pistol to the spearhead bolter - after the nerf to uncanny strike the bolt pistol has very little value compared to other precision weapons like the Zarona revolver due to the lack of global rending, meaning that the bleed it inflicts no longer guarantees a one-shot kill on important enemies.  The spearhead can do wonderful boss damage while still allowing you to effectively pick specialists off, so i tend to prefer it now.

Light spam light spam light spam EEEEYOOOOOUUUUUUCCCCCH my WRIST AAAAAAAAAAAAUUUUUUGGGGGh

This build can put out some pretty insane numbers at higher difficulty levels. Not for those with faint hearts or limp wrists. 

YOU CAN USE ANY COMBAT BLADE MARK!!!!!!! I JUST PREFER THE MK III!!!!! BUT BOTH ARE EQUALLY VIABLE!!!!!!!!!!

COMBOS (Catachan Mk III Combat Blade)
Hordes, anything squishy - Light spam + Push attacks 
Armour - Heavy 1 into repeating Heavy 2 -> light attack 
Bosses - Same combo as armoured targets + Boltgun weakspot mag dump

COMBOS 2 (Catachan Mk VI Combat Blade)
Hordes, unarmoured losers - Heavy 1 into repeating Heavy 2 -> light attack... OR just spam light attacks lol
Armour - Push attack -> Heavy 2 -> Heavy 3
Bosses - Same combo as armoured targets + Bolter mag dump AGAIN!!!!

Evoke castle doctrine upon specialists and gunners with your bolter. you should be trying to pick them off for your team when you can. 

Blades of Faith are MANDATORY!!!!!!!! with the spearhead - they allow you to animation cancel your bolter's lengthy draw time while also enabling quick specialist sniping. Feel free to swap the flak damage perk on the bolter off for carapace damage, purely for extra damage against packmasters (DON'T USE YOUR BOLTER ON ARMOURED TARGETS OTHERWISE, UNLESS IT WILL LITERALLY SAVE YOUR LIFE IT IS A WASTE OF AMMO)

You can also run this with the Artemia Mk III Purgation Flamer (Flak + Unyielding damage and Blaze Away + Overpressure ) as your ranged option to help melt armour packs - if you do take it then Blades of Faith are ALSO MANDATORY!!!! so you can both animation cancel the stupid long draw time and also snipe specialists. 

Some other sleeper ranged weapon picks include:
- Agripinaa Mk VII Combat Shotgun (Flak + maniac damage and Full Bore + Deathspitter)

- Zarona Mk IIa Quickdraw Stub Revolver (Flak + maniac damage and Point Blank / Hand-Cannon + Surgical)

- Ius Mk IV Shredder Autopistol(Flak + maniac damage and Pinning Fire + Blaze Away. You may also swap one blessing of your choice out for Inspiring Barrage) 

- Accatran MG Mk II Heavy Laspistol (Flak + maniac / Unyielding damage and Dumdum + Infernus / Ghost)

Swap points around as you please, many segments of the build are tuned to my preference - Blinded by Bloodcan be taken in lieu of No Respite (Though i feel that the infinite stamina is better than the extra damage), Punish Impiety might be fun.... etc, etc.

Oh yeah the Tac axe is good with this build too (Flak + Cara or Unyielding damage, Headtaker / Decimator + Brutal Momentum) . Use the Atrox Mk VII Tactical Axe to truly carpal tunnel-maxx your build.

Measure your success not by the dead in your wake, nor the damage you have dealt, but instead by the pain you inflict upon your wrists.