Sorry, I can’t help you much. We went with a commercial out fit and did not copy any of the routes. We followed the River Allier for a lot of the time but I can not be more specific than that.
Some of the towns we went to;Blassac,ChilhacReilhac, Langeac,PinolsTailhac,Saugues,Monistrolde Allier,Thoras,Viaduc de Garabit.
All I can say is that I am jealous of you having a house there.
It is a wonderful area with many miles of lanes, good food and wine and fantastic scenery.