Aside from administrative/leaderships positions (for which I like High Inquisitor, Grand Inquisitor, and Prime Inquisitor (to somewhat reflect "Primus")), do the Inquisitors need to be separated so finely? There are few of us, so surely it could not be too difficult to distinguish us by the individual. When easy sorting is needed, they can simply refer to our warbands. For that matter, what if it's not the inquisitors who and separated into Xth-Grade, but the warbands since we often remain in those groups for years?