I haven't yet. I am an ice, so it's really difficult for me. I can't figure out how to get all of the minions with the life one healing them up again. I was able to kill the one that kept putting traps on me, but by the time he died, there were enough to finish up the rest of the fight.
I first tried with my balance at level 60. My first attempt didn't work, but I adjusted my deck and have defeated her several times since with no trouble.
As in most boss battles, I like to take out her minions ASAP. The quickest way for balance is to throw two sandstorms boosted by gargantua. If you don't have sun school spells yet and good damage boost gear I think she would be very hard to solo. She would also be hard for schools like life that don't have a 4 pip attack all spell.
Once her minions are down I heal up a bit and then spam elemental blast, boosted by elemental blade and an occasional hex or balance blade. I also have a reshuffle to make sure I have enough attacks to finish her.
In a minute. sandstorm then spectral blast or chimera. but, as many others have said i am max level. many max levels are farming that dungeon and most of us don't mind if you join. just hang out in a crowded realm and find a team.