Basecoat model black. Paint skin necron abyss, highlight raised areas with mordian blue. Wash skin with asurmen blue. Paint scales mordian blue and highlight with enchanted blue, then very sparingly highlight ice blue on scales. Follow by a heavy wash of asurmen blue. This color scheme is simple and effective and will allow you to paint a ton of models very quickly. It will look kinda sloppy at first till you apply the washes and then it will blend everything together and make it look good.