I think Roz has summed up the gist of what feels "missing" but I wanted to point out to me not only does the faceless knight need some more detailing on his armor but I struggled at first to decypher what the dark mass on the far left was. I think the horse and possibly even the lance need just a few more details to make it more obvious what it is you are seeing. The use of orange flames just around the sorceress really helps draw the eyes to your focus with their pop of color, so if you do add more fire I'd suggest limiting it to close to her and keeping it still somewhat subtle. This has a very surreal feel and the muted, almost monotone scheme really works well. Right now she exudes calm and serenity in the midst of carnage.. too much fire could loose that. I think it is a beautiful piece and you have captured the feel of a massive battle with really very few figures, which is quite impressive. It's close to perfect but those last few details will take it from a great piece to a stunning one I think.

Ok I've been looking at this and wondering a few things. I think I saw it going in a different direction - you started off with some awesome detailing that promised more, but then it faded a bit and you stopped. I know the incomplete/sketchy look is your style, but I think just a tiny bit more detailing would really 'finish' the piece.

The dark knight in the front - I like how he is faceless, but maybe if his armor was a bit more detailed, so you can see the rigidness of it as well as the scarring and dents that a battle worn knight would have.

Same thing with the ogres on the right - maybe more detailing in their hair or even the deep set lines of their foreheads would give them more character, more emotion.

Everything else - the smoldering corpses and the background battle is - that is just perfect. Your sorceress is your focus, what about a little more fire coming from her. Not just from her hands, but that she IS the fire that is wiping out the bad guys.

Ultimately, and honestly, it doesn't look finished. However, your vision and style is breathtaking, no matter what stage you're at in the game. Your message isn't lost, but I do think it can be intensified. Hope that helps =x