I decided I'd try to get into PvP some with The Feast coming out. But I've been having a miserable experience trying to heal groups.

When the burst starts to fly, I feel completely powerless. Tried a premade 4v4 with some FC members and allies were dying from full health with stoneskin and a shield from nocturnal sect in the span of a single GCD (and I wish I were exaggerating).

How precisely am I supposed to cope with that sort of thing?

Thank you for any advice.