A quick and easy way to get Cultist up to tabletop quality.
Paint skin with Darkoath Flesh
Paint cloak with Volupus Pink
Paint pants with Gryph-charger Grey
Painted all of the wrapped bandages/fabric, interior shoulder guard on champion and the horns on the champion with Skeleton Horde
Paint all straps and holsters with Snakebite Leather
Painted outline of left shoulder guard on cultist champion Brass shaded with Agrax Earthshade
Paint boots and weapons with Black Templar
Paint armour plates, helmets, weapon accents and 8 point star with Leadbelcher then shade with Nuln Oil
Paint hair on unit champion with Nazdreg Yellow
Paint hair on cultist with heavy stubber with Gore-grunta Fur