Aww rajputs taken I'll go... Imamate of Oman.
It doesn't say difficulty... but if the battles are very hard I'm not interested (no more then hard plz!). Also the second rajputs can't be harder then the imamate of oman.. so you may as well enable them. This isn't v.s. ai.. small factions can band together. I mean if they allied with the sindh it wouldn't be too bad.