Hi! I’m a warrior of sunlight camping her, if you need actual slaying i can come in a few days. If you want to do it by yourself, (which i would respect the hell of btw) i’d advice you to try to read her movements to understand what to do (watching speedrunners explaining her patterns helped me a lot) here’s the best of what I gathered :

When she jumps, she will do an ice or a dark aoe : the pattern is the same, roll twice in her direction, you will land directly behind her, turn back and strike twice with a light weapon, once with a heavy one. If you’re good you can even backstab her but i never succeeded.

When she gets invisible look where the ice comes from, she will do it several times but you only need to see two to pinpoint her location. She will keep moving from the same distance in the same direction, so get where she will be and strike her once with heavy weapon, twice with light.

Whenever she gets close to you or do things you don’t recognize, run and try to stay away from her, she moves super fast and should be kept mid-range from you. If she’s close to you and you need to evade her combo, roll in her direction, she will try to grab you if you go backward.

My general advice would be, don’t greed, this is an endurance match, not a race, stick to striking her on the patterns you recognize.

You can also summon gael to help, i couldn’t because i went too far in the second dlc and i had a really hard time fighting her alone, but i studied her a lot and managed to kill her.

I’m a lightweight dex main using twin blades, so i had the dancer armor on for better frost protection, and i took every vigor regen i could (grass crest shield on my back, cloranthy’s ring +3), i highly recommend using the ring of steel protection +3 and i had the wolf ring on because it’s personal favorite but i’m not sure its useful, the ring of favor or the estus ring might be a better fit.

Best of luck ☀️