Time to throw out the Layer Weight node and start using this, a custom Fresnel node. When it comes to making materials in Cycles, the built in Fresnel nodes just don't cut the cake. The settings are just too limited and non-physically accurate.
I can't take credit for the inner workings, but I did create the node and the 3 shaders also included inside the Blend. The settings for the node are pretty easy to figure out, so I won't explain them. You can use this just like you would the "Layer Weight" or "Fresnel" node.
I also included three simple shaders to show how easy it is to get nice shading with this node.