Nice job on the warlock! His clothes especially turned out great!
The skulls... not so great... A couple of suggestions:
* Paint the skulls light brown around the edges and blend to white towards the middle. Kinda like you did with his muscles.
* Paint brown stripes from the teeth towards the nose(s).
* Paint his nose (or nosehole or whatever) black like his eyes.
*Also consider painting the teeth the same color as the skull itself and maybe redo the black in the teeth with brown.
* Let him have white rings around the black in his eyes, but paint a brown line under his eyes. It's kinda shaped in a way that suggests to paint there.
As for his helmet... NOW it's definitly cracks!
How about painting fake highlights along the bottom of all the black cracks? If you have a steady hand this would make the helmet look spectacular!


























