User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-5106744-20120611040013/@comment-5110811-20120613020645

The members of Castiel's garrison were just as powerful as he is. Status doesn't necessarily correlate to power except for Seraphs and Archangels. A Leviathan can take over anyone without having the vessel suffer any ill effects. An Archangel can only take over a vessel from a specific bloodline meant for them or else any other vessel they take over rapidly deteriorates and explodes. This truly symbolizes who has far superior raw power. That would be Archangels.