User blog comment:ImperiexSeed/ARCHANGEL or LEVIATHAN!/@comment-25146716-20141211173713

Archangels, think about it there only as much as 4 four archangels blades in existance

and ingredients to kill a levathian is way easier to get

Plus Archangels are high reality warpers, teleporters

they can just throw leviathans in a new dimension like gabriel did to sam and dean.

or get the ingredients and teleport to a leviathan and just simply kill it