Fitz's Nu Patch H40 Zeal - Burning Book Baby
 Zealot Build - Warhammer 40k: Darktide 

With the removal of the block sprint cancel, I think the Relic Blade will default back to being a generalist weapon more so than tankbusting. The Thunder Hammer more than likely will replace it in those builds (see Option C - Chudmangus).

This is a pretty standard havoc martydom build taking advantage of its great attack speed to make heavier weapons feel good into aggressive hordes of bruisers, ragers, and vanguards. Smaller weapons also work and crits will give your team 15% damage with far better uptime than Book's measly 30% every 30 - 45 seconds, not to mention that Book can sometimes inexplicably cancel, leaving you without damage boosts.

Speaking of Book, it grants Unkillable now. So, THEORETICALLY, two to four zealots could have Unkillable burn stacks with every cast if they stagger their Books properly. I'm not showing you that version here, but you would swap Against the Odds and Punish Impiety for Zealous Pilgrim and Fire and Fury respectively, then run fast weapons like knives, tAxes or duelling swords.