UV Density Based on Focal Areas

In both these examples, I was tasked with unwrapping the base male and female characters. This was the unwrap for the skin layer, so several factors were in play. We knew the bulk of the body areas would be removed when clothing was applied. We also considered camera height and where the focal areas would be. We wanted as many pixels as we could push for the face.
I achieved this result with a combination of smooth selection and scaling, tons of relaxing, and small tweaks till it all fit together like a puzzle.