Sorry for the long delay, I haven't really checked my DeviantArt messages in a long time, but I'd be happy to answer your questions
1.) For the textures on the mountains I used a couple of brushes that had a lot of little speckles. And then I usually went in with a hard round brush for snow. After that I'd use the smudge tool to blend it in. 2.) The fire is just photomanipulation. I found a picture of fire in a dark area and applied a Screen blending option to the layer. That way the black wouldn't show up, but the fire would. Just as a cheap trick, I added a motion blur filter to indicate motion. The sparks coming from the fire is also a manip. Just used fireworks in a dark area.
Dude. Holy shit. This-- I don't think-- Damn this is badass. I think how you do fire is certainly becoming one of my favorite aspects to see in your work, there's something very ethereal about it. And the miniscule armor detailing-- very nice.