I would sell Dembele and Sandro which should raise around £25-£30 million.
Capoue/Schneirderlin - Defensive mids
Paulinho/Holtby - Box to box
I wouldn't be too quick to sell Dembele. He has all the attributes to be an absolute beast of a Premier League midfielder. I'd like to see what a proper coach can do with him, rather than the overly defensive AVB who stifled his ability or the "do what the hell you like" style of Sherwood.