User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-5120709-20120529162257/@comment-184.77.255.73-20120531033537

Super Buu, sure, he was stronger than Kid Buu. Gray Buu or Fat Buu, now? Nope.

Fat Buu = Kid Buu + Elder Kaioshin; true, but he's weaker, because of his benevolent nature.

Imperiex, Buff Buu was the strongest non-fused Buu.

Now, let's get back to Supernatural.

In regards to "danger-level", Archangels win. Yes, they didn't wanna turn the human race into cattle, but that's irrelevant.

Michael and Lucifer were gonna nuke 1/3 of the planet as a side effect of their battle. With that in mind, Michael would've smote all the "unworthy" after killing Lucifer because he doesn't tolerate failure.