Many would prefer the La Fleche way,i would cut through Le Lude to Le Mans,empty road.Good Rouitiers at Loudon and Trois Moutiers.
Through the flowerpots Toby . Best and cheapest way down, or was. If you were light or had a bit of horsepower and spirit of adventure Irun was but a 10 stretch away
Thats my route Toby and as you say a couple of good routiers on the way
Klunk