Sam, the Rambam had no problem with Neviim performing Nisim. I don’t recall anything against the ability to perform a Ness through Sheimos, either. He definitely believed in a non-natural existence, and he believed in conscious stars that affect us. He clearly writes that a Malach made Bilam’s donkey talk.
He also held that Nevua is not bound to the Geula, since he was against figuring out the date of the Geula while he gave a date for the return of Nevua close to his day.
So why would it be out of the park to say that a Chasid, who is Davuk in Hashem and Tzuros Elyonos (as he writes of a Navi) can bring about wondrous things?