The traverse of the Perrons ridge above the Emosson dam is a classic mid altitude scramble.
Most of the height gain takes place in the approach walk and scramble. After that the ridge climbs and descends a number of towers along it's length. Most of the ground is not too technical. It is quite exposed in places however so you need to be reasonably confident with that.
Two of the towers need to be abseiled, the first in three sections and the second in two. A 50m rope is fine for this and the anchors are all bolted.
Start and finish by the red figure with the sign "départ" close to the restaurant (see picture).