User blog comment:Xilinoc/Ch. 654 - Deadman Standing/@comment-26091912-20151204015106/@comment-5657895-20151204192111

I dunno if that's accurate. They seem incredibly powerful given how it takes more than one person to even fight these guys, and even then, they do so much damage to everyone they fight they leave them incapacitated for a while. Mayuri and Zaraki were taken out by Pernida, Lille is still alive and has incapacitated Shunsui in a manner of speaking.

More to it, the four of them did defeat the Royal Guard with their Volstandig, which is a huge deal. These are some of the most powerful characters in Bleach.