Either from Val d'Herens (Ferpècle - Bricola - Glacier de la Dent Blanche) in 6 hour, or Val d'Anniviers (Zinal).
From Bivouac de la Dent Blanche follow the easy ridge towards a rocky rib (3.592 m). Surround it by the West side. Then ascend directly the rocky ridge up to P 3.733 m. Push forward on snow (sometimes), climb numerous interesting gendarmes. Reach a tower with a height similar to Grand Cornier, descend 3 or 4 meters by a chimney on Mountet side. Follow the ridge climbing three gendarmes until the summit.
Ice axe and crampons. Rope and other rock-climbing gear are advisable.