I believe that is tooltip bug, test realms always have some errors in my exp. 150/300 fester potency would make more logic than 150/200. I hope that bane damage is not gonna be 80% damage reduced as well. It become really bad if it that weak. Black mages get new ability with 650 potency aoe with almost zero mana cost so it would be no reason nerf summoners aoe that hard.

Seems like summoner gonna be changer for more ruin spam than dot management. Every dot is gonna be 30 sec duration so you barely even need cast them anymore. You can put first dots with tri-disaster, you can put second dots with tri disaster and third dots with tri disaster because of how aetherflow and dread stance works. Aetherflow have tooltip that says you can not use it during dreadwyrm stance? Does that mean you can not use any aetherflow based abilities during dread stance or you can not just activate aetherflow during stance? Healers mana management skill is now usable for even summoners so i guess spamming ruin 3 outside stance gonna be even more common in the expansion. Not sure will it become boring class because ruin gameplay may ruin everything.