I find that much time can be wasted messing about with contrast variation, when the control should be mainly about exposure. Why not try zero contrast control and fine tune exposure. You will then be in a better position to judge contrast and it will also tell you more about your original exposure and development.
Ignore the shadows for a bit and nail the highlights with exposure. If the highlights look good printed this way then you may be better off using burn and dodge.
Mark Barendt, Beaverton, OR
"We do not see things the way they are. We see things the way we are." Ana´s Nin