Managed to get past Ogre today without all archers/healer/1 glad. With the way we did it it got a little tight at the very end on MP but we managed to do it. Now bear in mind it took us all weekend to get it so it is by no means possible but VERY difficult. The beginning of the fight is extremely imperative, mages especially need to make sure to keep their hate as low as possible. After that it's all about keeping the tank's health up and of course managing MP.