Need help~

Hello~

I have been trying to master the mesh fill and I'm making progress. 

My last question (on the forum) was how to blend a vector object, with drop shadows for shading, into a mesh fill.  I didn't get any answers on that one.  So I'll try again with a different angle on the question.

If you're making a complex mesh, for example a human face, how do you keep from destroying (e.g. the nose) as you work with the est of the facial shading?

I have used Ariel and Vlads tutorials, however, I'm stuck on how to bend everything together.  I attached an example.  The eye is all vector, lips are mes, and the face, including the nose are mesh.  The face and nose are one mesh object. 

Any suggestions will be greatly appreciated.

Patty