I haven't looked at my copy in years, but if you have a vapor barrier do you also need polyethylene sheeting? And doesn't faced fiberglass insulation have a vapor barrier? What you're describing sounds like overkill.
But I have to admit it's been about 15 years since I gave a copy of Gold's book to my builder and said "do it like he says." The guy couldn't believe that a Ph.D. might have anything useful to say about construction.