Not easy to have a good SSS on Octane. There is only two shaders with it, the specular, and the diffuse. I don't really understand why we need to mix materials to have the effect. Well, I don't really like to mix a diffuse and glossy mtl, so it is a specular material. Not so many tests, but the result is not so bad. I really looking forward to see a good implementation of a skin shader on Octane, like Arnold does.
Model by Bertrand Benoit.
(Yes, it is way too glossy)