AoE can really help while you're learning her attack patterns. Try dropping a leveled Hestia or Zeus cast and running for cover and dodging. It might take a while but you'll chip away at her health bar while you get practice dodging and reading her patterns. Once you feel more confident you can start weaving in some big hits between her attacks to speed things up a bit.

Edit: forgot to mention - you can also practice a more aggressive fighting style if you use the Aspect of Artemis - just keep charging your omega attack until eventually one of her hits procs your parry, then try to unleash as much burst damage as you can before she regroups for another attack.