Bishop of the Ecchliesarchy
 Zealot Build - Warhammer 40k: Darktide 

The Combat Knife is used primarily for horde clear and damage mitigation, while the Bolter is used against any and all specials/elites. With the combat knife, you become nearly un-killable thanks to the toughness damage reduction bonuses. Specifically, Faith Restored (75% DMG mitigation on CRT) is what we are building around. In a pinch, it is necessary to have ranged damage, though. The Bolter can be replaced by your preferred ranged alternative, as long as it can deal with specials/elites.

UPDATE:

With the recent changes to melee damage (some melee damage goes through toughness now), the build has been updated to include more bonus max HP, +1 Wound, and damage resistance for gunners (the main source of damage we take). You can also replace Holy Revenant with Faith Restores All for more consistent healing (lvl 20 ability) at lower level missions. We MAY also be able to take Honour The Martyr instead of Rising Conviction, as the base knife damage on weak attack is actually rather low, but more testing is needed. Another note: Most armored enemies are Flak. Don't ever do Carapace… trust me. The bonus Toughness Damage Reduction (on the curios) might also be redundant, but further testing will be needed to confirm.