Can't beat Geddon anymore

I've been through MC a couple of times. I have routinely killed rag. But now I can't get geddon down at all. I'm not sure what happened other than my recollection is that you could continue to tank him between phases and now it looks like he just kills everyone in melee range on phase change? I'm running rend with banshee, garg, faerie dragon as a base. What decks do people use?