I survive it (sometimes) with 30% hp, sometimes it just oneshots. That is with energy shield (25% red.) and static barrier, and me waiting to instantly interrupt (aka he kills me on one tick). 19,3k hp fully buffed.
However, yes, I mostly survived it. Not sure how other people are supposed to survive it though, since he does it on random target after the first one.
That aside, the second bug where he goes immune is doing me in. Tried everything, stopping before 10%, stopping before 5%, nuking through before force storm is casted.. nothing helps.