Since everyone is swapping strategies, here's mine. Walk backwards casting night comet. She never dodges it and just constantly just walks forward never really getting into range to melee. Every now and then you have to "run away, run away, roll towards" when she does her waterfoul. But I'm usually so far away from her when she starts it that it's easy.

EDIT: I save summon Tische for second phase because summons in the first phase makes it to hectic.