looks like youre having fun. I'd try popping a more, and softer hair light (so it wraps) or a very subtle background light with a color gel on it just so you can get some more separation/isolation. Also, watch the focus, it looks like your DOF was either to shallow or you just slightly missed the focus. I dont know what youre using for lights, but you may have to get them a bit closer if you cant change your exposure.