I agree with Santa and Malochai. I think the fire needs to be painted and a little more gore can't hurt. They are corpses after all! I think get those bits painted, then base it. That way you can see how everything else fits. I often like to start with the base because then the rest of the mini just ties in with it and it feels like it's more naturally part of it.
Base it and then consider washes and the like.
Cheers,
u_m