Here is my first round of thumbnails mainly exploring the demon class. I think I have narrowed down it down to two main ideas. One of which is a Demon, although the final makeup of his form still needs to be determined. I am shooting toward some sort of demon-taur with four arms, probably a lava/fire Demon Lord. The exposed bones/teeth/claws will be glowing white hot out of his body, like exposed magma. My other main idea would be a Norm Clericon centaur druid (based off of a deer). At the moment, I am leaning toward the Demon, but I will be producing another round of sketches, I just wanted to get some input on what I have so far.
Here is a quick painting of what I will kinda be going for in my character model. I just wanted to put up a profile, so I opted out to leave the 4 arms out of this one. The larger arms are for combat, and the smaller ones are used to cast elemental spells and curses. His smaller arms will also resemble stigmata, but lava instead of blood sort of.
Also, here is my concept for his axe that he wields, a demonic skeleton/corpse fused with a lava blade.