Help with Crossbow MAIN Witchunter

I want to build a Witchunter whose main damage comes from the crossbow itself and not grenades, leaving those for support like gas grenade + corrosion for armour break and shock grenades for shock appliance.

Right now I'm running the High velocity rounds + scatter + double barrel. (Maybe I'll add here lacerate to bank on phys damage, and pick bleed passives, then brutality and maybe chain?)

For packs I use the galvanized bolts + light infusion + pierce, clears very well

I'm carrying gas grenade + corrosion + armour explosion

Voltaic grenade + second wind + conduction

Explosive grenade + fire infusion + primal element

Also Ripwire + lockdown + brutality

I want to transform this into a main HVRounds damage build, with maybe a secondary AOE ammunition for AOE

Could you share some tips on passives or support gems? Thanks!