Heavy sword DH solo, max reliability
 Zealot Build - Warhammer 40k: Darktide 

Daemonhost solo capable heavy sword build (no ganking till it activates required), unlike the marty variant does not require untill death to be up. You do less overall damage but are incredibely durable so no need to worry about random things oneshotting you in havocs, this also lets you swap benediction for purity against bligth spreads.

Spam sideway dodges alternating push attacks and heavy attacks aiming for the head. 

Ranged and blitz slots are open but i like to have recon lasgun to knock out BON quickly since its very dangerous to melee solo (get eated nerd) and it tends to outpefrom melee for dpsing down the melee twin(big deal in havocs), blue lasgun mark is also pretty good at stacking up piety in difficult situations. Flame nades are just great for doing massive aoe damage in clutch situations (obliterates chaff so that you can fight the bosses mostly unimpeded) and it stacks piety by making kills.

For crushers - FOTF + heavy into alternating special with heavies directly to forehead. If not comfortable against crusher balls swap lasgun for bolter and nade for knifes.