In reply to TonyM: Hi Tony
As Viv has pointed out the diagonal ramp line form the top of the second icefield is not that hard. Even very bare of snow or ice it would not be hard to climb. There is a short section in the video where Will finishes out from that couloir- when we were on it it was fine conditions wise- I expect it to be even better now with all this fresh snow.
At the top there are two exits according to the Rebuffat guide book. You can either go up left of the tower on some horrendous loose rock or you can take a pretty dicey traverse on some powder covered slabs into the ice that we went up. Its a little tricky to get to the start of the runnels but once you're in it's an easy romp to the top.
You join the Croz spur at the first icefield- well we did anyway
Jon