As a general rule,I don't see any top ranking guys doing hits themselves. Even at the associate and soldier level,most guys,if given the option to avoid doing a hit, would take it. Why expose yourself to a potential life or even death sentence if you don't have to?
Of course you will always have the psychos who enjoy torture and killing,but they are pretty rare.
As a ranking top notch guy,you can enjoy the layers of insulation that come with the post,sit back,and let the money kick up. There will always be someone who wants to move up and will do your dirty work for you.