I like this. i think you nailed the lighting. The overall composition looks well planned and executed. You have a great balance of warms and cools in this image with perhaps one exception - the red eyes as the accent to the piece may be a little too strong. The body anatomy is great and one of your strengths - really good. Id say practice facial anatomy more - if you can nail this too, you can make a strong bond with viewers with expression and add mood to your pieces. Again, love the lighting.
The lighting is great. So is the colour, and it's the colour which makes Sylvanas stands out-- it is murky enough to show the darkness of her but not too dark to make the image blurry.
What I want to point out is the perspective. You have made a great use of dutch angle and low angle, which makes Sylvanas looks more imposing and menacing. It just shows all the blood and iron inside her.
However, you should try to work on the facial features, especially that her eyebrows are exaggerated -- she is not a chola. Another con is the bow -- if you are not going to decorate it, put it at the back.
Generally, this is a fabulous work, considering the original perspective you used here (I must say that low and dutch angle suit her well, though I seldom see her in such angle in DA). Keep up the good job!
I'd love to request your permission to use this piece in a youtube video I'm making, Your name would be mentioned in the credits, and when the movie was done, I'd post a link to it on your profile page, so you could watch it. But if you'd rather not let me use it, that would be totally okay! I just think it looks amazing, and would love to use it! Thanks for considering!