Psyker
This weapon Blocks both Melee and Ranged attacks. Additionally, Block Cost is reduced by 22.5-30%.
2.5-4% Bonus Critical Chance on Chained Hit. Stacks 5 times.
You can Hipfire with this weapon while Sprinting. 6-15% Close Damage while Sprinting. Also reduces weapon spread at all times by 30%.
18-30% Toughness on Elite Kill.
https://darktide.gameslantern.com/builds/9db918c3-717e-459c-8e08-260008e484e1/perfect-swordsmanA variation of my build above, but going all into defense for high havocs.