Go to the top of flegere. Continue straigh ahead for some 50 meters and then put on your skins. Thee is usually a track going upwards. You are going to the summit in 1h. The you come to the backside for the skiing.
After getting to the col du crochuse (the summit) you have a quite wide and open slope to ski down. There used to be a glacier here but not anymore so you can leave the harness at home. Normally you come from Pointe Alphonse and hence ski down a bit to the right and then it turns left. You can also access from the Belvedere and reach a steeper area.
The run will take you to Buet where you take the train back.
you are in the backcountry quite far from the lifts.