She has, in fact, planned criminal enterprises before. Relatively harmless ones, like sneaking food around for people at night to avoid rationing and tariffs, she assures them. The massive scale of planning a coup... Shouldn't be that different. But what she hasn't done is plan with magic on her side. How reliable is this spell? How carefully will that person follow her instructions? How flashy and attention-getting is that other spell? And so on.
Does anyone have outright teleportation? And ability to track a person she knows? There's someone relatively trustworthy she knows who might be good at staging a popular coup, and moreover cleaning up afterwards...