We had a real go at Nefarion today. Now that I actually understand the fight it was pretty good, we actually made it to phase 2!
Though there were quite a few rough patches. Me having difficulty keeping Thraso alive was one. I finally worked that out in the end. Tail swipes and not chain healing him was the problem, once I did that it was fine. Second hiccup was trying to keep Gobbi alive. He died in phase one almost every attempt! I think the tail swipes got him quite a few times and then the electricity. Now we've got to figure out how to get on top of the pillars and interrupt at least one blast nova!