Alright, my friend...you've soloed just about everything in the game. Time to put on your thinking cap for Cora!
I think a passel of stealth Mystics could do it, with a character standing by to rez. I had no trouble staying alive with just one of these templates down there...although I didn't do much damage. A single RC was able to eat away a tiny portion of her health bar.
Accept the challenge!