You do you. As long as you’re having fun, that’s what counts.
I just switch out my characters when they have used all of their resources. So when Gale runs out of spell slots, I remove him from the party for somebody else with full resources and hit points. That way I can use everybody and don’t need to long rest as often.
Its because transmuters stone recharges after you cast a transmutation spell otherwise after long rest, so if you want a buff per character you are encouraged to do this :x
