I did it with another wizard and a monk tank. We pretty much stayed close together moving counterclockwise as he spawned clouds staying close to the spawned cloud. Just as we made a full circle the first cloud disappeared so we could continue our rotation. It took us a couple of tries before getting it down. Its definitely much more challenging but still doable.
Overall I like the change however I have yet to see how it affects solo play. The adds were a concern for both wizards and we didn't have to worry about the vomit.