@RoninGrey @BowsacNoodle I paint everything but the bosses in generic shades so they can be used to represent more than one character when needed.
The Lich is the "Dread Sorcerer" mini, and you can use him for any NPC spellcaster. There is a female variant in the Spirit Queen's Torment expansion.
The Sorcerer could be a lich, or simply a Cultist wearing a skull mask. That's why it's best to paint them generically.
Here is the Dread Cultist from the Rise of the Dread Moon expansion w/ masks