User blog comment:Calvincambridge30/Versus/@comment-3481504-20151023054224/@comment-3481504-20151023225323

Gabriel wouldn't have to smite them all individually, he could kill thousands at a time with the snap of his fingers.

Seraph Cas could snap his fingers and apport them all to the sun, incinerating them all.

That much Leviathan would definitely win, but they couldn't kill her because she has the mark of Cain.