I think she's kind of overrated. I don't like the crit stuff in her kit because she's an arts servant who will almost always be going against neutral. I don't like the defense buff because you're probably going to use it on herself and being an arts ruler, defense is much less value than another type of buff would be. The attack buff isn't too strong, and the arts buff is only one turn. The only reason I put her as high as I did is because she has a common super effective multiplier on a pretty spammable arts NP.