I tend to like reflected spot readings off of the brightest parts of the skin and placing them at zone VII while using a developer and film combo that doesn't block up highlights.
Or else I put my important shadows at zone IV and then develop by inspection, pulling the films when my highlights look "right" to me.
I note that both methods tend to give an extra stop of exposure vs "standards". This is my preference and I know I'm not the only photog who likes to give portraits more light than landscapes.
There is no correct method. Use what works for you, ultimately this will be a part of your look.