Overkill Stalker-Boltgun Veteran
 Veteran Build - Warhammer 40k: Darktide 

Still tweaking but main point is to knock the boltgun into overdrive, taking advantage of the ability to have the effects of 3 weapons blessings via taking the onslaught perk you now have an anti everything weapon that dishes out tons of critical hits, aoe, bleed stacks on direct Impacts, brittleness stacks, rending (for player only)

By leaving the last 2 perks open you can invest into which ever keystone and sub node you feel works best for you, all three are perfectly viable depending on final details of your playstyle 

 This gun becomes anti everything and rewards careful and patient shots as well as having a full auto hip fire for crowds and close quarters. Manage you ammo efficiently and you'll have no issues with anything in front of you. 

Executioners stance again will bring even more damage and can really be abused with headshots and aoe damage into crowds of basically anything. Managing to keep the ability up near constantly is possible too thanks to easy elite and specialist kills. 

When it comes to primary weapon chain special attacks with the chain axe and watch it deal special critical damage all day long as well as an extra switch speed for quicker light attacks. 

Covering fire may be a worthwhile investment with the build too as you can buff and protect allies by shoot targets near them. 

Switch between frag or krak grenades as you see fit. 

For best results use weapon customization mod and get a scope or optic. 

Mod is PC only.