With some discussion from Alan, work progressed today on making Four's skin look more skin-like.
I went back to using a MILA shader to make use of the subsurface mechanics, suggested that for best results in terms of light scattering, i needed to mock the consistency of wax.
With that done, highlights were needed. Using the specular map I had designed for previous shadings, I installed gloss and specular layers to the model. The gloss provided a highlight while the specular provided a tinge.
With the subsurface working properly, she is looking considerably more lifelike than before. Her skin looks more like it has texture and consistency while the subsurface gives a satisfying tinge to more transparent parts of the body.
The next phase will be to add some difference to the colour of her skin, to give blemishes and areas where her skin might be thinner than normal such as on the cheeks, where blood is more visible. This will give hopefulyl a rosiness that gives her a sense of life that boosts the subsurface scattering going on.