any tips on dealing with this?
I thought you were suposed to get a warning about him - was doing the event today and he popped up with no warning and before I could even react most of my withered were dead.
The tanks in my guild absolutely faceroll this scenario, often with like 40 withered or more on 90%+ health at the end. It really helps to have loads of stuns and interrupts I know, I gave it a go with the Felguard, Axe Toss is extremely useful, but maybe the Infernal can tank and agro better. I;ve heard it suggested you attack with the infernal, and then manually move it away from the army to stop the arcane things damaging them (interrupting the final Unstable cast, which I;d use Meteor Strike or Mortal Coil for example)
But th emain holdup is Dro, several times he's just appeared and slaughtered all my withered in about a second. Literally, he appears and bang, they are all dropped like flies. Without that little warning thing by Thyrissa I thought you were supposed to get? And yes, I avoid attacking the webbed victims. He seems to pop up out of nowwhere in the big arc shaped area with the spiders. I'm aware that he needs ot be kited and his charges stopped, but it was quite literally less thn a second and most of my withered were dead before I could do anything.