In reply to dominic5567:
One of the major buttress routes would be an unforgettable day out. Both West and East buttress go at about (IV,5), depending on the route that you take.
West Buttress has a couple of different starting options. Starting up Fuselage Gully probably shortens it a fair bit, but you miss some great climbing on the West Central Gully start.
There's a (IV,5) line up Central Buttress too but I haven't done it, and route finding looks complex.
Edit: Didn't read your post properly - one of the buttress routes followed by the traverse would probably mean doing the traverse in the dark, and might be a bit more 'epic' than 'long'. Still, if you get a good clear night, it could be magical.
Andrew.
Post edited at 09:52