Practice on Kalecgos has started. We had our second one-shot of Illidan on monday. This week was a full clear of Hyjal and Black Temple in 2,5 days so we had half of monday and all of tuesday to try Kalecgos. Trash leading up to him was plenty but nothing serious, it took about 45 minutes to clear it.
The fight in itself is a bit messy right now. My eyes are still adjusting to what information is relevant as there is a lot going on in the screen.
I'll write more about it when I have something to add. Also got myself my third T6 piece, the chest from Illidan on monday, yay!