I have, once I united India, I conquered all the middle east along with Tibet. I had a very intricate imperial government that gave lots of power to the nobles. The very beginning of the unified empire saw the imperial crown as an elective head, but than once my dynasty got ousted from a 200 year reign...I got kinda ticked, so I committed treason and over threw the emperor to reclaim my birth right. After that, things were pretty good, considering that my empire never got struck by the black plague while the rest of the world did. If you ever plan on unifying India and controlling the west, keep your capital in Debul. Debul is part of the silk trade with three different routes going through it, makes for a very rich economy.