Just a point about last years tour. When froome cracked on the alpe dhuz, took a chocolate bar from porte, and then was fined a bit of time, i thought it also affected his tour after that, as he was never quite as strong.
think if he the nutrition is right, that wont happen - and maybe thats why quintana didnt want to take him on this year.
So overall, i think froome will win with or without wiggins adding to the eam support.