In reply to Chrisk1:
> 1. Champex to d'orny hut; although I see the chair at the bottom is not working which will add another 650m vert to the hike
It's much nicer to go up from Praz de Fort which makes it into a circular walk. Descend via the Champex route. If you're feeling lazy hitch-hike up to the prise d'eau!
There's a path from the Cabane d'Orny to Trient that avoids the glacier if you want a night at 3170m after Orny.