User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-63.117.245.61-20111218210951/@comment-3481504-20111220200926

No I don't, but it was said that he could wipe out the host of Heaven, which would include the archangels. Cas describes him as a "weapon" of Lucifer, insinuating that archangels are better, which is likely the case.