[@MelonHead]

Thanks so much, your answers are really thorough and helpful! 

An unranked battle would be great. I'd be happy with the powered/low powered bracket, although I'm not familiar with vampires or werewolves specifically - my tastes tend towards medieval fantasy, sci-fi, superhero, etc. What kind of characters/setting would you want to have?

Edit: Just saw and read your cheatsheet, think it's an awesome resource.