User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-5120709-20120529162257/@comment-5120709-20120531023408

Kid Buu was weaker than Super Boo and all his forms, but he was the most dangerous because he was a mindless beast (remember when he blew Earth up while he was in it)

Going back to Supernatural, we're not discussing who's stronger or smarter, we're talking about who's the most dangerous, and that would be the Leviathan.

Maybe the Archangels are stronger and smarter, who knows, but it's the Leviathan who actually threatened Earth. During their season the Archs didn't do much, just chasing Dean and Sam, and during their season the Leviathan almost turned mankind into cattle.

So if we go by power, maybe the Archangels are stronger, but if we go by actual danger level the Leviathan win