According to what you write, wouldn’t it be better to try to have three chulyas with seven wraps and four with three, in order to fully be yotzeh the shittot of both the Ra’avad and the rest of the rishonim?
One can think up many ways to try to be yotzei all the many sheetot. I would not recommend inventing sheetot, but rather choosing one. If you want to be yotzei both the Raavad and the Rambam. Make two begadim, one tied according to the Raavad and one according to the Rambam.
– Mois Navon