" So we have different experts who have different opinions based on their own hypotheses and different methodologies."
This is of course the usual state of things in Science, and History Studies of course. So it means you have to sensibly make a choice, as even a consensus of experts can be wrong.
What is not in doubt is the testimony of the heavens, in the form of eclipses, in this case Lunar eclipses.
Four Eclipses are of interest to us around the period in question, 19th March 721, 8th march 720, 1st September 720 and 22 April 621.
As we know when in the reign of the relevant king these occurred, other events can be fixed with certitude from those dates.
All of this debate on this Thread though somewhat obscures the fact that regardless of when events in the distant past actually occurred, there is no way to prove that 1914 C.E features in Bible prophecy.
The JW Org constantly harping on about the nearness of Armageddon, and that we are in the Biblical "End Time" has no support in Astronomy, History or Scripture.