I have always held to the belief that you should train your eye and visual system along with your "color vocabulary" to work in the following way.
When you look at an image you should be able to decide "what do I want to do with this image?" and know the toolset in front of you and reach for the correct adjustment.......one at a time. Colorists do not paint by scopes or levels. They paint by eye first and use scopes only as a guide for technical or consistent painting.
This may not be the answer you are looking for but flesh-tones can and do vary greatly depending on a wide range of photographic conditions. Firelight from a night campfire or high noon on the beach.
A colorist will paint by eye first to achieve the desired results and then may refer to a scope if at all.
Steve