In reply to agnew1985:
By the Taconnaz Ridge do you mean the ridge between the Tacconaz and Bossons Glaciers ( the Montangne de la Cote )? If so this is the route of the first ascent. From the top of the ridge you are close to the Grands Mulets Hut and there are a variety of routes from here to the summit.
One big disadvantage is the huge height gain required on summit day so you need to be well acclimatised. The area between the top of the ridge and the hut can be quite entertaining , seracs and interesting snow bridges.