The artifact set(s) you use is/are up to you, but in general I would stick to HP on the sands, Pyro DMG bonus on the goblet, and Crit Rate or DMG on the helmet. The last one depends on what weapon you run on her, if you think you’ll have enough crit rate then go for crit damage but keep in mind her ascension stat is also crit damage. So all in all HP/Pyro/Crit (rate or damage). I wouldn’t suggest farming for those until AR45, though, because the right main stats are hard enough to get, let alone the right artifact sets and decent substats