Briar talks about the Valravn fight during the S.I.N infiltration, when you ask him about him being friends with monsters. he mentions how Charlie and Zara's powers didn't work on him and that he had to use more of his power than he ever has. He then says "Even big sis needed me". So yeah, Valravn was beating tf out of them to the point a lvl 4 Ella needed healing.I just don't think Briar healed Ella. I don't remember it being said anywhere that he did, and it'd be weird for her to need that in the first place.