I'm not even sure it needs a bump. Raise the hightlight size and lighten the highlight color a bit, and you'll get some nice tones overlaying it. Really nice texture. The sharpness comes at only the corner of the mouth where the lips meet, but that may be the way the light is falling on the texture too. It does look a little like there's a bit of nose hair sticking out though. I look forward to seeing the final version. Great job.