What do I require? SARPE? (photos)

I am currently looking into having the "surgery first" method which would involve double jaw surgery to correct my open-bite and slight under-bite (only have 4 molars touching). - Should I have the SARPE surgery first to expand my upper palate and then once healed, have the double jaw surgery? Or, with the ability to slightly expand the upper palate during Lefort 1, will that be enough for my situation? - How soon after SARPE is it possible to have the double jaw surgery? Thank you!