In reply to TheGeneralist:
A couple of the 'usual top rope' suspects are
1) Tear (HS - one hard move) - SW Buttress. Useful to have a spare rope (static) of about 15m (a very safe nice lead and then you could just belay multiple followers up as it's a walk off and back down).
2) Go left and then up from lower Pinnacle (Chalky Wall) there is a small crag that has trees for top roping above it. It's not listed in any books but I think is known as 'Outward Bound' crag for obvious reasons. It's got some v diff ish lines which you can make harder
3) Keep out of people's way and set up a rope above Sheep Fank. Some VS/HVS lines to play with. Awkward to rig (might need a belay into the trees from the right if not confident)
4) Promises on Dundee is a lovely HS with access and a good belay for 'top' roping (not bottom roping - although you might be able to) don't polish it up too much!
I agree with the leading comment - Right Wall on Styx (VD) is doable in one pitch with a 60m rope. The Gutter (D) is the classic starter crag which gets more interesting as you get higher but is definitely multipitch. Abseil to get off unless you lead the very nice last pitch and make an insecure scramble walk off.
I'd support the recommendation of getting a guide as you'll get so much more out of Polldubh that way!
Tim
Post edited at 19:04