Bubbles I need in the Entity fight for handling Commanding Death are Power of the Serpent Ring, Storm Blood (cause it's electric damage) and Serpent Transmutation. Maybe I could risk and skip Transmutation but it happens often to me that when vortex appears I still have few seconds cooldown on other two bubbles and I don't want anyone be killed by vortex when I will try to kite it until cd is finished. My current build is like this but dps is poor, I guess some adjustments could improve it. Of course I'm aware that I can't compete with mages in this fight, specially that I have to heal them well on platform when bombardment comes, but still dps gap between us is too big:
http://joharaoc.eu/feat?link=v1_11c3...8b0838c9c38cfc