Thats a nice run, Gorge du Daluis running down the West side is really nice (picture with red rock) has nice scenery and great bends without any sections of endless hairpins, IIRC the gorges du Cians is nowhere near as good but hardly like slogging arounf the M25 either.
I would probably take the D28 to Valberg across the top as its wider / faster / better surfaced than the D29, the D30 through Rubion is stunning, if a bit bumpy in places.
The 6202 along the bottom is a bit "dull" in this company, but Entrevaux is very pretty, and I don't think I have ridden Col de la Sinne - another one to add to the list ;-)
Some amazing roads all sit just North of this loop, Allos, Cayolle, Bonnette, Vars, Izoard to name but 5.