Playing an Indian Ironman game. Started as Kosala, formed India by 1050. Woulda had it by 1000 but subjugation CBs are bugged for Indians, and ran into a bug where the last independent king's only demesne holding was a barony in my territory. Won TWO wars for someone else's claim on the kingdom, and in both cases when I won absolutely nothing happened. Finally fought for the claim on the barony, THEN fought a war for a claimant. Bingo -- now vassalized.
Fucking game won't give me the Samrat Chakravartin achievement though.
Most of the subcontinent is Hindu now, and I've claimed all of Baluchistan as well. Tried to start holy warring Afghanistan as well, but a combination of a bop on the head combined with the Arabs bringing up larger reserves than expected (and being close to an independence revolt to begin with) meant settling for white peace. Gonna wait a decade or two for my new Samrat to get things settled down then try again, maybe while they're having a decadence revolt or are busy with the Byzantines.
Also using viceroyalties for most of the subject kingdoms -- keeps any would-be malcontents from establishing too solid of a power base. And if I give to old geezers, chances are they'll kick the bucket before their factions can grow strong enough to cause problems. And the new viceroy will love me for the title grant after they're gone.