Aberdeenshire West & Kincardine
Argyll & Bute
Berwickshire Roxburgh & Selkirk
Inverness, Nairn, Badenoch & Strathspey
Orkney & Shetland
Ross Skye & Lochaber
I don't see them losing any of these seats. Most of them have fairly big majorities. So let's look at the four seats I am predicting they will gain from Labour.
Aberdeen S - Labour maj of 1,348 to overcome
East Lothian - Labour maj of 7,620 to overcome
Edinburgh N & Leith - Labour maj of 2,153 to overcome
Edinburgh S - Labour maj of 405 to overcome
East Lothian may be a long shot, I admit. Edinburgh South is a three way marginal, which the Conservatives are targetting too, but they are 3,500 votes behind the LibDems.
Dunfermline & Fife West, Willie Rennie's seat, is classed as a Labour hold, although you could also argue it is a Labour gain. But he won it in a by election. If he retains it, which I doubt, it would push the LibDem total up to 16.