Your best yet Imo. It's ok, I think you need to blend everything in just that little bit more, and you need to work a little on your lighting, especially on your render. The text is Meh... I'd try leaving text for now until you understand fully how to get it to look good and blend well with the signature.
My summary: 6/10
Note: Your other works I saw didn't make it past 4/10 imo
So you're improving. Keep it up LOKOS.