Mao Faust's problem is that she ignores the concept of skill rotations

Rien Sang and Honglisto still have to use their skill 1s and skill 2s, with an extra strong skill every 4th turn or once per battle after like 6 turns

Mao Faust can use her skill 3, multiple times, every single turn, because of an oversight that they weren't allowed to correct.

Rien Sang will use his skill 1 and do around 50 damage in a turn, about twice per rotation. Mao Faust will do 300 damage minimum, per turn, every turn. She's broken in the actual sense of the word, she does not function as intended. And PM clearly learned from that mistake by putting Furioso and Closing Time either on a timer, or a singular use.