Ecstatic frenzy AND barrage is a no go on 90% of the situations. Whatever manages to pass through your barrage will most likely hit you melee. If you stop shooting to dodge and move, stuff will stop dying and more mobs will go after you. Past Hatred you will have issues. This tactic is good to brute force a boss tho, coupled with spellbind.
Dragonlore is a MUST here. I recommend you checking SuchBalance's bowzon guide. It may be a tad old, but she didn't change very much in the last patches and everything is explained in a way even a beginner like you can understand.