Sigh. Erbiatas was the first Bloodborne boss to give me an actual migraine. She killed me six times before I finally bested her. My main strategy was to try and work my way in close and try and smack her from behind. I didn’t like staying out in front of her because when she would whip out a charge move I just couldn’t seem to dodge her quickly enough. I also used fire and shock paper and the latter seemed to be more effective than the former, so if you have +8 Tonitrus I recommend giving it a try. Sadly my Tonitrus was a mere +6 so it was next to worthless on her. Good luck hunter and remember that it’s all in the Blood my friend.
Bloodborne Bosses: Ebrietas, Daughter of the Cosmos Strategy