Ekbab fight in act 2

A few issues with this fight (as melee)

-No flask charges except when one of the two bosses dies
-Boss death makes the rest harder, so you have to damage them down together, but no flask charges

It's pretty frustrating to be honest, just the combo of things, a mammoth chasing you around with attacks that come out REALLY fast. It charges into the wall but doesn't get stunned, just turns and attacks instantly. Meanwhile the mage can't be stunned out of the big orb attack, the thing I actually want to stun him out of.
The lightning strikes telegraph a little circle, but then deal full damage in a much larger area than the telegraph (in total something like 50% of the platform).
Sort of hard to dodge ground stuff while dealing damage because most of my abilities MOVE ME. But you have to keep damage up, because one of the bosses has 2k energy shield. Even rolling magma or whatever it's called, I actually don't want to step forward while using it, I'm trying to run away.

I'd love to alt spam charge gain onto my flask. But, you know.