From the parking at Boucher follow the GR50 north, at the first long bend west take the track SW leading to the to the ridge and the Serre des Hieres. Follow the ridge to the top near the croix de la Salcette, from there traverse in to the face next to the Crete des Lanciers. Climb this face, (be aware this is a steep face and south east facing so will have the sun on it early). It gets very steep as it come to a small col/breach at the top.
Ski the opposite side to the col you arrived at, head north and then pick the best line through some rocks. Roughly follow the combe Brune, back down to the GR50. Once on the GR50 skin/pole back south to the parking.