In reply to Mark Stevenson:
We were (can't be arsed to make a trip to Scotland given the current forecast) intending to do the whole thing. We'd anticipated hopefully doing it in a day, but would bivvy at the start of the ridge, so would have overnight gear in any case. My partner has done it before. We are both competent, if not overwhelmingly experienced mountaineers. This may have been evident from the footwear I stated I possess, though I suppose you might have consigned me to the "all the gear, no idea" category. But I don't think I gave you grounds for doing so.
No, rather, we are both pretty competent guys, but I just don't have any approach shoes, and wasn't looking to splash out on more gear right now (career break / Alpine summer coming up). My partner, though, had suggested that from his experience, going light was really valuable, and I might not be happy with big boots. Hence the question.
And thank you all for the replies. Were I not dodging the weather, I'd have worn the Trangos.