Tac Axe Zealot
 Zealot Build - Warhammer 40k: Darktide 

This build is designed around high toughness damage reduction and recovery for survivability. It has up to ~71% toughness damage reduction with all buffs active and regenerates up to 12.5% toughness per second, with additional toughness recovery from Second Wind and Fury of the Faithful.

Shred can be taken in place of Brutal Momentum if you value single-target damage over horde clear. The axe gets up to 72% crit chance without Shred or 92% with it.

Ranged weapon can be whatever you want. Good options include bolter, flamer, recon lasgun, and las pistol. If you want to use a different blitz than Blades of Faith, then consider bringing Godwyn-Branx Mk IV Bolt Pistol, Agripinaa Mk VII Combat Shotgun, or Zarona Mk IIa Quickdraw Stub Revolver. I like the laspistol for high DPS against reapers and monstrosities.

Prime Target is a flex point and can be swapped for Anoint in Blood, Thy Wrath be Swift, +10% TDR below Chorus of Spiritual Fortitude, etc. You can path through Shield of Contempt instead of Against the Odds if you prefer. If you want to be selfish, you can drop Infectious Zeal and take something else instead.

Suggested attack combos for the Atrox Mk VII Tactical Axe:
Horde clear: push attack > heavy > light > heavy > repeat OR heavy > light > repeat
OR spam light attacks
Single target DPS: light > heavy, then (light x2 > heavy > repeat) OR spam light attacks
Single target stagger: special action > light > repeat