There's a lot you can do for this. His feet don't seem to have any coloration, and he gives off more of a dark mage vibe than he does a thief vibe. Try to mirror things less, force yourself to draw limbs individually and play around with poses, the more you press yourself against the hard things the easier it'll get.
If necessary, bring up a program like DesignDoll to create a reference to turn about and study from various angles, it helped me especially with hands to be able to do that.
