flatfish has it nailed. out and back probably the best.
i did it on a wet weekend going in a clockwise direction (i.e. Glen Sligachan section last). instead of taking the notoriously muddy strath mor path, we took the strath beag path (slightly further east if you're lookinbg at a map) as we thought it might be better. we were wrong- the strath beag path, although it looked promising at the start, soon turned into an unrideable murky path. about 45mins/ hour later of pushing we reached the summit. from there down towards torrin was superb, but you have to weigh up the awful push to get there.
the glen sligachan bit was superb though.
can give grid references or maybe a .gpx file if i can figure it out to steelfan if you are interested? email is in profile i think.