This is a fairly straightforward fight from a healing perspective. There are only a couple things to keep track of here, but the challenge of Megaera is in the intense healing that it requires.
Megaera is a hydra with many heads. Thankfully, we’ll only be fighting two heads at a time – and to make it simpler, only be killing one of the two. There are three flavours of heads here (yeah, that sounds so wrong) : red (flaming), blue (frost) and green (poison). The most common strategy is to kill the red and green heads alternatingly, and completely ignore the blue one. This healing perspective is with that strategy in mind.