Let me first say that I don't know how qualified I am to give you a critique as your skill level is above my own. There are a lot of things I like about this paint job. The two things that most stand out to me are the leathery look of the cloak/robe thingy and the highlighting/shading of the green cape. I will be referring to these pictures the next time I try to acomplish those effects. As for the metal, I like the tarnished effect. IMHO the markings on the back/top of the sword and the hilt seem a little too bright for the tarnished effect. To me, it looks like they are glowing, which might be the effect you want. The markings on the front/bottom of the blade look right to me.
Thanks for showing your work.