>>411098095
I would really not worry about something as small as Animator layers right now. They do make an impact, so if you can minimize your layers that's all the better.
But if you have 3 different sliders controlling 3 different values, you basically won't get around the fact that you need 3 layers. You can't use 1 animation to control multiple distinct values separately.
Don't go too crazy and make too many animator layers, but if you need 3, then 3 it is.