[Mark17]

Michael Heiser was extremely good, but he was not the only one to talk about these issues. Others, are Tim Alberino, Trey Smith, Chuck Missler, Gary Stearman, L A Marzuli, Tom Horn, Mondo Gonzalez, and others.

[RoosterRedux]

Yes. Those are great sources. The reason I like Heiser is that he uses his studies and research in ancient languages to support his conclusions.

Have you read "Unseen Realm"? I recommend it highly.