Be aggressive on the fight. Use tp on ws and burn trance to cure yourself (tp better used on ws instead of curing, just save the trance part until your hp is in need), otherwise you'll get in a loop of curing yourself over dmg and waste time (like soloing hard stuff). I noticed she used building flourish for her dancing edges, which would hit for around 400-500dmg, used quick steps every chance, landed desperate flourish, etc. She can also decide to just spam dancing edge like maat would spam asuran fists if you take too long though, so be serious.
I didn't take it seriously when I derped around at 80 for this and simply took too long. She did 4 DE back to back and that was it (I cured in between and one was weak, though it did skillchain on me lol). This wasn't very long after I engaged, maybe 3 minutes or so, most of that time toward the end spent curing. She will soon have good acc against you due to gravity and quick steps and will deal fairly high dmg on you for a dagger swing. Uses dnc abilities semi-intelligently though gives you a break in only using curing waltz 1 instead of higher versions, but will spam it.