The only thing I will add to this discussion is why the arbitrary need to come to a decision so quickly on an important doctrinal position? Was there some type of deadline that had to be met? I held to the Synergist position for nearly 25 years before I changed. The author of the OP is a young man. He may be surprised to know that he may change his mind quite a few things before he reaches my age.
My stance today leads me to conclude that Jesus never taught theology whatsoever. From what I see, His teaching is entirely spiritual. Historical Christianity, unfortunately, has largely concerned itself with theological & doctrinal questions which, strange to say, have no part whatsoever in gospel teaching. Therefore I would agree that it would be prudent to hold off on any conclusion that may change over the course of ones lifetime.