Last year somebody suggested La Promesse Des Profondeurs 6b. First you had to go to En Vau. There is then a path up to Castelvieil, marked in blue. To get on the Plateau of Castelvieil, we had to climb either a 5a or a 4c route. With the help of the gps we found the rappelstation. And it was clearly marked with Les Dents.