I've gotten some attempts on him in 10 man. The other night we managed to get to phase 4 on the first attempt and wiped. After that though it just seemed to kind of go all down hill, the healers couldn't seem to keep the tank alive during the Plasma blast, which was odd. I think next time we get to him though we should be able to get him down -- we had the strats down, it was just the tank dying as a problem. (CD's were being popped, I'm not sure what was happening that night).