I am sorry, but I am not an expert on diluting Suboxone. If I were doing it , I would probably do as simple 1mL to 1 mg dilution to keep it simle for yourself. There is probably more information on Google somewhere about this. I am sorry I can not be more helpfull. I would have thought though, that you would wait till you are down ti 1mg to stast diluting it down and tapering.
Well, good luck.