In reply to c beechey:
I have done this route but it was about 30 years ago so I don't remember details. I remember that the descent, particularly down to the Glacier de la Gondoliere, was very unpleasant because of loose rock; the ascent was fine.
The glacier will have changed considerably since then so it is probably worthwhile asking at the Refuge du Chatelleret if they know what the descent from the Tete is like.
I am sorry I can't give you more details but I hope this helps.