In reply to neil9216:
Think I'd head off North before hitting Strathyre and head along Glen Ample. That'll take you to the Glen Ogle Cycletrack, and off to Killin. Then you'll have to decide whether you want to heather bash or take the road. West or East. You're going against the grain of the landscape so there'll be doglegs whichever route you choose. I think if you're seduced by a straightline Balquidder crossing to Glen Dochart, your route North after it will be a challenge.
The Glen Lochay road is scenic and peaceful. If you take it and you're feeling strong, you might include a Meall Ghaordaidh traverse over to the power station at Stronuich as a way of making that munro of interest. You could play the same tactic for the munro Meall Buidhe, North of the Giorra Dam, which would give you Bridge of Gaur ( if you've chosen West from Killin, you probably don't want to head along the road to Glen Lyon's Innerwick for an alternative way over to Rannoch).
From BoG, head West along the road towards Rannoch station. I'd use the track East of the Allt Eigeach which takes you to Loch Ossian past the ruin of the old Corrour lodge, rather than walk the rail track or bog hop. You might also have fun crossing the watershed to Glen Nevis if things are in spate.
It's not the most aesthetically pleasing of routes I've just tacked together. I guess it just depends on how you want to plan things.