Yeah, Yuyu is also a great option. She will be my best chance at 3* this bs of a challenge (she is one of the 2 witches I'm planning to AW together with Adele).

I cleared my 2* attempt with a max CR Calliope, Cloris and a lvl 40 Calliope (no CC) to be able to clear that first rush. After that you should be completely fine with the units you have and the buffs.