Board Thread:Questions and Answers/@comment-24847491-20141024100731/@comment-5491919-20160605020416

Feat wise at least the only Royal Guard that showed particularly strong abilities are nimaiya and ichibe. I suppose you could show the cage of life but that takes preparation and hardly puts kirio above the rest. Byakuya should be above both unohana and kenpachi I believe, he has the skills to beat them. Also aizen should definitely be higher up.