I've used this guy several times which much success against larger (medium-class) opponents. Using it's 8/12 speed with MASC (8/16) allowed me to gain great defensive advantages.

I spray painted the (disassembled) mini with gray primer and then painted it heavily with several coats of "icy white" base, leaving nice gray detail lines where I wanted them. I gave it "metallic blue" eyes, which matched its Ghost Bear logo. I added decals and then applied a coat of glaze to protect and seal it.