I have not read all your points yet but to begin with your claim that Scripture places the birth of Christ under Herod the Great is incorrect. The Herod that is mentioned in scriptures is Herod the Great’s son. We know this from, among other clues in Scriptures, Matthew 14:3 where Herod places John the Baptist in prison for: “Herodias’ sake, his brother Philip’s wife”. Herod and Philip were the sons of Herod the Great and both were Tetrarchs (regional rulers). Herod the Great died about 4 years before the birth of Christ.
Furthermore, I believe any discussion regarding the date of the Crucifix need take into account the extensive research Sir Robert Anderson conducted and recorded in his book The Coming Prince which is available for free online on many sites. He places the Crucifix in the month of April, 32AD.
JB
quick question: was not Jesus and ma and pa in Egypt until herod the great died? when they were told to return, they found his son on the throne and so continued to Nazareth...or have i my schooling a bit confused?