I get to this point now Lacilaci, blending a Non-SSS with Specs/reflection + a Pure SSS (VolumeMTL) , but i was inverting the Blend Order ( i didn´t notice there´s an order) so my sss was becaming like glass...
Now it´s mixing better, but using mix to add reflection seems to ask for a better masking work (not just a 50% mix) cause it´s tonning down the difuse maps a lot for me. And mixing too much SSS effec on areas like Brows turning it from Dark Black (on difuse) to light Brow. Probably this is the correct output, so i need to work more on masks to control SSS effect and mixing.
Very nice tests man ! :)