Well, I picked up Fiendish Codex II and was disappointed, when I got to the bit about the Baatezu hierarchy. The rest of the book is fantastic, but the authors turned their respective brains off for the hierarchy, opting to nix the red tape (on a plane founded on red* tape, no less!) and say, "Higher CR means higher rank! NARF!" Naturally, I wasn't going to stand for that, so I busted out Faces of Evil and expanded the old hierarchy.
(Click for the full shebang.)
Makes me want to get back to work on my notes for next year's campaign through the Hells.
* -- The blood makes is what makes the tape red!