Roughly what are you thinking of studying in uni?
Dropping normal maths for further, at least in my school, meant taking the same material in half the class time (since taking FM but not normal maths A level makes zero sense).
My fluent (albeit HK rather than mainlander) Chinese classmate managed to get a C in A level Chinese so it's no free A* by any means.
Art A level is a ton of coursework, and is useless if you aren't applying for art or architecture at uni.
Biology A-level is not conceptually difficult, but requires a ton of material to be covered, so moves at a rapid pace.