Synod in Torghast is popping 2.6m insta hits.
Read gameplay tips there as CS doesn’t give any. According the comments, this is intended to be a hard boss and it doesn’t seem to have issues otherwise.
You can however give feedback through the ingame button, 2nd from top Anub’Arak icon and then give a suggestion to perhaps make it an easier fight.
It’s not hard… It’s impossible.
2.6m hit across all party members amounting to 12m damage in 0.5 seconds?
Is this how it is intended?