Frankly I dont think any Buckingham Nicks tunes "work" within the context of Fleetwood Mac... because the majority of the concert goers won't know the songs. At least from the band's perspective I don't think they would perform them. I think "Don't Let me Down Again," which sounds as if it could've been on the "white" album, would work in a World Turning kind of way.
That being said... I would love to see "Buckingham Nicks" do a theatre tour and do all of their solo material along with 4 or 5 B/N album cuts.
