Best Practice for Skin SSS Maps?

[blastframe]

Hello,
I'm trying to control which parts of my human model get subsurface scattering (namely the nose and ears).

The closest I've gotten is using a map that only has red color for the nose and ears in the Transmission Channel. Here are my map and my Scattering Medium Channel:

Color Map

Scattering Medium Settings

The result, however, is barely noticeable in the beauty pass unless I really increasing the light's power, overexposing everything else in the scene.

Main Pass

Transmission Pass

Is there a better way of doing this? I'd like to be able to see subsurface scattering happening at a lower light power if possible.

Thank you!