From the Alpe de Villar d'Arene hut retrace you tracks from yesterday up to about 2180m. You now head SSE towards the steep slopes that lead up to the hanging valley above. Climb these by the most practical way (the line will vary year to year). It is usually refrozen and you'll need ski crampons, or to climb it on foot with crampons and axe. As the angle eases off, approaching 2500m, you can return to more gentle skinning, taking the easiest line, usually an arc in ascent, gaining the ablation valley behind a moraine wall at about 2700m. Continue steadily on up onto the Agneau Glacier, joining it at about 3000m. The angle of the glacier is relatively easy, but the challenge will lie in navigating a safe route through the zones of crevasses. This is not a great place to be in poor visibility. It steepens around 3330m and there is often a large transverse crevasse, splitting the entire width of the glacier at around 3350m- a good snow bridge will be essential here. Above, to Col Emile Pic, the terrain becomes easier angled from about 3400m, arriving at 3483m to great relief and a great view! The Pic de Neige Cordier above you is an extra fine summit, for barely 150m of extra climb. The descent on the far side of the Col Emile Pic on the S side will normally involve a rappel of 20-30m, before gaining steep snow below. It is a pleasant ski down and R on hopefully good spring snow to the Ecrins Hut at 3175m