@anon75934406
Fastos And Meton reveal secret Tongues of Demonology/Angelology
There are many magicians that have been having experiences that prove literary sources wrong. If an angel tells you he doesn’t work for any god found in literature, would you ask him to cite you a source or would you believe him?
Also look into Enochian magic. Michael created a whole system of spiritual ascent that has nothing to do with any JCI deity.