In 2015, I went this way via Loch Beoraid then to Oban bothy then through Glen Pean. I took the lower path on the map from the bealach above Loch Beoraid to Meoble - it was more or less non-existent so I'd try the higher path next time but no guarantees. The bit from Meoble to Gleann Todhail is tough going - took me longer than I expected.
A long hard day but a fabulous walk and quite doable in good weather. I planned on going by Oban because if the weather had been bad, I'd have stopped there.