Thanks to everyone above for their insight, advice and encouragement on this one.
Quick update: myself and a couple of pals bagged MaR today. Pretty much exactly the route that Dogplodder writes about in the excellent walk report here.
My pals decided to carry onto to Spidean Coire Leith via the path bypassing the Am Fasirinen pinnacles.
But I had bagged it twice previously and didn't feel the need to do it a 3rd time. So I back tracked the way I had come. We had a fabulous day out. Amazing views of Ben Alligin, Beinne Eighe and out over to Skye and even the Western Isles.
I'm sooooooo glad to have gotten that Liathach monkey off my back!