Kale is also a solid option if you have her since she's largely the same as Madonna (special attack deals 140% damage three times, 26-36% proc rate based on skill level, has 1.2x proc rate for the entire squad as an ability, pierce-type Knight). It doesn't hurt that her other ability increases attack power for the entire squad so heavy hitters like Mei Plumblossom and Anemone can hit a little harder alongside Kale.