I was trying to do the sw vision on my rogue. I had not previously attempted umbric before so I decided to go there.
He teleports and starts casting the thing. With current affix you get slowed down to snail speed when trying to get to him. Then once I got to him, he immediately teleported to the opposite of the room and continued casting. I did not even have time to apply dots on him.
Only reason I ever got to kill him, it seems, was because instead of immediately teleporting to other side of the room by the time i reached him was because he started casting polymorph and I had time to reapply dots.
I spent most of my time trying to get across the room with the stacking debuff that slows you down. It was a huge sanity loss.
How is this supposed to be done? Help!