This Saturday at market my teenage assistant will add wax to frames he's already assembled.
He prefers to fit both bottom bars at first fix, leaving only the sheet and closing bar to add. As he has several hundred to do by March, I encourage his technical free thinking.
The method works well but not in hot weather, because the sheet loses flatness and doesn't slot in easily.
Wax in now? I can't see that much will be lost if the boxes are stacked and sealed, apart from a little bloom, which warm weather or bees will deal with next spring.