Her "Sight" seems extremely strong. I'm not sure others have anything more than that either. I'd assume the "magic system" of this world is based more on pacts and deals, such as the guy with his ghost henchmen.
I wonder what Mieurko could do with her power? The guy in the suit seemed to be pretty powerful, maybe she could do something similar, making deals with gods and spirits. Not that kind of manga though lol.