User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-86.152.141.13-20120417201704/@comment-3481504-20120510173055

See:

It's like, Leviathans > Angels, so they're stronger than demons. As they are, they can beat and eat Angels, and basically everything.

Yep, unkillable does not unstoppable, as the Winchesters stopped Lucifer. Also, now it's learned they can die.

Imagine Raphael. He could immobilize them with lightning, or just kill them as an Archangel. Whichever.

And Archangels are stronger than Jesse, otherwise Lucifer couldn't be able to control him.