On nightmare, with a warrior and no ranged or magic hardly (+1 rang str from a ring and only 1 in mag mis) at lvl 15. The only way I could do it was to get him to chase me around the column at the entrance. He can't go all the way around because of a rock. When he got in the corner, I summoned my creature, and he was pinned in. Then I would jump in and out of the action with all I had. Amazingly the poor creature made it with just a sliver under a breath from death.
Gooood Boy...
