I'd also say as far as mukhs that use oud, that for the folks who have them, it is the best use of that oud oil. Personally, I have experienced very few oud oils I'd be upset if they were used for mukh. I'm sure there's many out there but I can't generally afford them, and they generally aren't used in mukhs anyways as far as I can tell. I'm sure there are some exceptions but I'm also sure they were used in a mukh with other very precious ingredients if so. And for the other oils, I do believe it is possible to create a mukh that is greater than the sum of it's parts... an oud that may not be spectacular by it's self can be part of a mukh that may be spectacular. I certainly enjoy the mukhs I have that contain oud, and I'd be sad if they were gone.