User blog comment:Winchester7314/Possible Recuring S8 Purgatory Monsters/@comment-175.110.59.49-20120704184048/@comment-3481504-20120704225428

Monster scale:

Dragons > Jefferson Starships > Phoenix > Vampires > Wendigo > Arachne so on and so forth

That's the basic idea. And yes, you're right, Ghouls are pretty weak.