In reply to Tony the Blade:
It looks like you've got two long days with a shorter and slightly fiddly looking one in the middle. Hutchison to Corrour is not a very neat looking line, unless you go back over Macdui.
What about doing all the 4000-ers?
Day 1
Ski Centre, Cairn Gorm, Loch Avon, Loch Etchachan, Hutchison
Day 2
Hutchison, Macdui (optional extras, Derry Cairngorm and/or Can a' Mhaim), Corrour
Day 3
Corrour, Carin Toul (optional Devil's Dong), Sgorr an Lochain Uaine, Braeriach, Chalamain Gap, ski centre