Decided to post this as only old builds exist for this weapon. For FG I have only tried Warlord with this weapon but I love it because of the respectable crit value and Smite being a 100% piercing wps with significant damage.
Aim for 2.8k DA and kill -DA Debuff Enemy/Bosses first (e.g Gabal’Thunn). Craft bonus is your choice, more stun res is recommended and then Angrim bonus.
For HC players I would recommend 50-52 for farming, but 65 is reliable enough with Aether Clusters (typically for Grava or crazy aggro in boss room). Lots of free hotbar space so using consumable like Courageous tincture, Barrowholm oil is recommended for boss room. Some res such as chaos are a bit tight so bloodbound pot is worth it before entering boss room.
Notes on gear:
DA looks low but make sure you do not settle for anything other than max DA% and attack speed rolls on the rings (it is easy to reset coven vendor by checking the two vendors at homestead), a one-handed physical shooter benefits greatly from the extra cunning this allows (but you can if you want put more into physique).
The boots were filler (they allow me to shift points into cunning), slow was already overcapped. Hadn’t acquired better rolls for that slot yet. Worth noting Mythical Final March is an alternative too.
Gameplay is pretty simple, keep Warcry up, Doomforce once every 10 seconds and shoot away.