User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-76.95.86.12-20120519182004/@comment-31.53.226.53-20120520222901

yeah the plan to open the cage took decades but actually opening it " at least in sam and deans case" took less than a year. and finding a purgatory native is very difficult, plus in what circumstance would death not give you his ring? he doesn't want to be lucifers puppet. however, no purgatory native will willingly let you bleed them out, in fact the vast majority will eat you. the length of time they were the a villain doesn't make up for strength. that would make meg stronger than any of them. the fight between the archangels was using their angelic powers. if leviathans can deactivate their powers, then the angels are nothing. with them leviathans don't stand a chance but without they're defenseless. plus sam was able to regain control over his body after lucifer jumped him. to date no human has overpowered a leviathan inside their body. point is leviathans probably can defeat archangels. it just makes more sense. otherwise why not just have michael smite the major threat to your favourite creations? because it would put michael at risk.