In reply to Chris Manasseh:
Haven't actually done it, but was planning to use it as descent.
It's a huge scree slope going up to the coll and there are paths or at least a path. Seem to remember there is a path coming down and one that curls back to the foot of the south face.
So have no doubt it's doable. I seem to remember some talk of a ladder to get down from the Coll.
It may even have been sign posted from Contrin, but on that I am less sure.
Post edited at 07:46