Which to show rigor? Discrete vs Linear Algebra vs Calc 2? Science course?

[1dadinNC]

@compmom

Her theater experience will be key in getting in and rigor is not as crucial in the sense of taking the top most rigor level classes. She has already exceeded the rigor needed in math and we don’t know about her science. I would continue to maximize her theater, dance, music.

This.
Kids that are serious about a career in performing arts rarely target USNWR T10 schools. They shoot for Julliard, Curtis, Conservatoire de Paris and such.
Unless the goal here is to use this route to gain admission to a T10 school, in which case it will be more useful to try and convince the AO that her passion is real through higher accolades in the arts.
Taking another math class will be pretty useless IMO.