"Brute Squad" was just Bob referencing The Princess Bride, as far as I can tell. In my head, I picture them as heavy bruisers. I think, if there is a new "one," they'd be the wardens Ebenezer had with him in Turn Coat, when he was waiting for word on Morgan's location to go take him down. Basically, just combat veterans who know how to bring the pain really well. Since the other thread got me thinking about the Codex Alera, I'd compare them to Knights Ignus—devastating, but very small in number.