Black for the clothes. Wash clothes with Biel Tan Green. Paint the armour, weapons and shield Leadbelcher. Wash armour, weapons and shield with nuln oil. Drybrush armour, weapons and shield with leadbelcher again. Paint the flaming eye with memphiston or khorne red. Highlight with wild rider red if you want. Skin can be bugmans glow with an agrax earthshade wash or a castellan green and biel tan green wash. For the bases try painting stormvermin fur, drybrush with either dawnstown grey or underhive ash. The base rim can be either steel legion drab or dawnstown grey. This is just the way I would paint it