User blog:Sosuke Aizen008/Who is the most powerful in stern ritters?

Who do you all think is the most powerful in the group of Quincy's namely Stern ritters? There is a lot of stern ritters so i have a doubt.Are they arranged according to their power?If not then who is the most powerful in the list given below?(don't consider the Bankai,they have stolen) A.As Nodt B.Quilge Opie C.BG9 D.Cang Du E.Bazz-B F.Bambietta Basterbine G.Driscoll Berci