Pity. Arabian armies are actually much fun.
Poor Emir! What is that sultan wants stalking him?!
And Sultan actually appeared as a military ruler who couldn't hope to become a Khalif, in the days after Khalifs' power waned (also the former were mostly Turks, but I don't remember whether the word itself is Turkish)... while Emirs & Sheikhs titles were used by chieftains of desert tribes in question
who performed religious duties also & later these became associated with aspect of religious teacher, though still used in their previous sense (so, now we have both Sheikhs who lead some tribe in Emirates (at least it was so at the time of Laurence of Aravia) and gurus of the same title. In game it would probably be better to differentiate between the two, just to be sure
)