I had a lucky break on level 6. A big bad Ogre was chasing us and we ducked into a room and slammed the gate. I thought we were safe, but somehow he got in (through a portal, I guess) and he hit us before I knew he was there. He slammed us again, knocking us right next to a resurrection crystal. We fought toe to toe till all were nearly dead and then turned and got resurrected. That was enough to keep us going till we killed him. I am nearly through level 6 but have a tricky puzzle to do yet.