As for Sgurr a'Mhaoraich I did have some ridiculous plans to go around or over the SG ridge but I think at this rate I'll take the hit and do the walk in and out from Kingie which will probably make it about 24 miles on foot all-in.
Not so ridiculous, I went that way last November, when accessing the Watershed. There ae some good stalkers paths. You could also take in a Corbett...unless you really aren't doing any of them until you compleat your Munro round. If that is the case I would say that you are missing some great hills and there are plenty that combine well with the Munros.