The way this Build works is that you'll buff with Golden Vow and you'll use Golden Arrows to take down targets from a distance with your Erdtree Bow using Mighty Shot. Some fights you won't be able to stay far away and that's when you'll swap to your Black Bow.

You'll use Barrage and quick shots with the Black Bow to set Hemorrhage on targets that are too hard to kill at range, or range is simply not an option using Blood Arrows. You can also pop on the Silver Tear Mask and use the Swarm of Flies spell to assist you here.

Blessing of the Erdtree is used to keep your HP at full so you gain extra damage and should be used before boss fights, or when you need to heal but aren't in immediate danger. It heals for 50% more HP per second than Blessing's Boon, which is a lot.

Protection of the Erdtree can be used before bosses that deal fire, magic, holy or lightning damage that's hard to dodge. And Elden Stars can be used in cooperative play to pressure bosses from a distance.