Her TLJ costume and look was the best, the grey-ish tunic she wore was very well designed, stylish, and symbolic of her development as a Jedi since her Jakku days, a Jedi spin on her classical costume, and she looks prettier with her hair down like that, the TROS design was kinda weird in that it felt too similar to the Episode VII costume, not nearly as good as the ones from VII and VIII, but it's still good,
The VII costume is the second best. it's quite iconic, then the scavenger variant, and her worst costume is the Ach-To one , i don't know what it is about it, but it just looks dumb and not as visually appealing.
The Dark Side version is somewhere in the middle, she looks cool in that, she reminded me of Empress Vaylin from KOTET.