I killed her when my group of seven was at level 12-13. It was a tough fight, we had to do it over a couple of times because my element shield kept fizzling, but we managed it with no casualties in the end. We didn't have any elementals, but we did have a potion of superman and the ring of the road. They helped A LOT. She's pretty tough to hit if you're low level and aren't buffed up with supermanliness.
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