For all monsters you can get 460 charm points.
Doomsay cultist - 30 charm points
Acolyte of Darkness - 30 charm points
Bride of Night - 50 charm points
Nightslayer - 50 charm points
Midnight Warrior - 50 charm points
Midnight Spawn - 50 charm points
Shadow Hound - 50 charm points
Herald of Gloom - 50 charm points
Bane of Light - 50 charm points
Duskbringer - 50 charm points