In reply to Pietrach:
Did it with Chleibh a couple of years ago and reckon it took about 2 hrs for both to the top of Lui. Hour down.
The recent rain may be a n issue. I recollect going under a culvert under the railway then ? across a river. Then some boggy bits and up a long convex grass slope.
Generally it was easy but was dry.
The route is described in the SMC Munro book if that’s any further help.
Post edited at 18:19