We spoke with Michael Cole, Ballroom Pythons South, and in the wild the night temps drop down to just below 80 degrees. With that said I would look at getting them into your 85 degree incubator and just keeping a close eye to make sure it does not over temp as you work it up to the proper temp. The Female can only add a degree or so by coiling on the eggs unless she has some place to crawl and get additional heat then bring it back! Just make sure the humidity in your incubator is through the roof.