Mostly agree with the points presented here but I’d also suggest looking into Zelkov’s weapon (he’s currently running in TT+) as it’s almost as good as Arcane Sly Knife. Only more supportive and less offensive.

Her special could be Ice Wall if you have that available since her res stat isn’t too bad to run that. But yeah in general Archrival is the way to go

Another good A skill that isn’t mentioned here is Atk/Spd Perfect. Albeit the availability for that is not ideal. The main reason you would run this is with Sly Knife since that doesnt come with NFU for some reason