Originally Posted by
khrave08
Our group was having problems originally just doing GRGRGRG, but what made it possible for us is lusting during the second to last rampage. That way, the red head gets killed faster and there is less poison bombs coming in from the back of the cave since when the final green head spawns, it won't be sending acid bombs any more. In the final phase, cinders should probably be dispelled close to instantly, because they start hitting very hard.
As a disc priest, I highly recommend Divine Star on that fight, since you stack between rampages it hits everyone and can be used twice during each rampage. It also does some damage if aimed properly.