Follow the path through the scree, below the scree cut the corner on the left, down the grass on the LHS of the path until it turns to heather, then direct to the stile. Follow the boggy bits and other natural gaps in the heather.
I marked my whole route up on bikehike as near as I could, including all zigzags and shortcuts:
http://www.bikehike.co.uk/mapview.php?id=9484
Did you go via Dun Deardail? There's a good track from there to the forest road, then a track down through the forest that misses out the zigzags on the track.