I don't want to discourage you from making your own independent study on the family of Herod. But what I intend to do over the next few weeks is put together a position paper on my current thinking. Basically I am using what has been learned from the study of role playing in the centuries preceding Herod to "predict" or "reverse engineer", if you will, what Herod was thinking when he attempted to play out the expected mythological roles in his own dynasty.
I don't see anything wrong with your approach of extrapolating backwards from Arthurian times. There will probably be some really good insights that come from that. To use computer software lingo, my approach is "top down". Your's seems to be "bottom up". Both can be effective. In fact, I have made several "passes" at the history preceding Christ. What I learned about relationships in later periods was often very helpful when I went back and revisted earlier times, and in fact this process ultimately resulted in the insights presented in the new tutorials.
© Charles N. Pope, US Library of Congress. All rights reserved.