Do you have the revised version of the SMC Cuillin Guide that come out near the end of 2011?
It has improved topos over the previous version.
If you want to stick to Diff/Vdiff another book option may be the SMC Skye Scrambles book.
Lower-grade rock climbs overlap with higher-grade scrambles.
Also worth a look is the book, Classic Rock - covers whole UK not just Skye.
Two easier classic routes worth considering are
- Dubh Ridge from Loch Coruisk
- Pinnacle Ridge of Sgurr nan Gillean
Big mountaineering challenge is a Ridge Traverse.
Here's a report from Pinnacle Ridge
http://www.walkhighlands.co.uk/Forum/viewtopic.php?f=9&t=2064(The first photo in my report was used for the topo of Sgurr nan Gillean in the revised SMC The Cuillin book)