Based on the old Bad Demon gone good but still uses demon powers to kill evil.
i.e. Spawn, Ghost Rider etc
You would have demon skills. That could be !@#$ing awesome.
Now that I'm writing this out it kinda sounds like maybe a death night but thats not what I'm
invisioning. Technically I've never played WoW so I wouldn't know wtf a Death Knight is like I'm sure someone will tell me.
Demon Warrior= demon auras e.g. powered scars, tattoos, or markings; that grant speed, life steal, or phase shifting
Class Weapon= claws, chains
class specific gear= soul gem? or something related to letting them break free of their masters: the Primevals.
Demon Castor/Ranged type: does more enchanting type spells to make self stronger and attacks from range. Not as mobile. Maybe some type of Shadow form.
Class weapons:: Spear, Whip, Scepters
Just throwing ideas out there. Don't have a beta key and suffering.