Do I really need a guide for Ama Dablam?
Some teams do not use western guides however almost everyone employs the services of Sherpas at a minimum. The route is straightforward but can be confusing especially now with the modification mentioned earlier. I would not want to navigate it by myself in harsh conditions. Also new ropes need to be fixed on the Yellow Tower and perhaps in the Grey Couloir so you must have the skills to do this if you are the first on the route. Never, ever trust old ropes.