Seeing him might help...
Even if there's a click to enlarge, it would help to make it appear a bit bigger and remove the black background.
I would look at at the old Final Fantasy games, cause they had some minor shading done on them. Otherwise I might spring for 32x32 or something, cause when half your pixels are shading, the details are pretty lost.
In terms of what you have, you seem to go halfway with the effects of the fire ball. It illuminates the arm and hood that are facing it, but the torso and robe kind appear to be lit only in the center when there's not a lot blocking them.