Mostly this is just standard EU4 empire building. However the hard part is getting a high enough discipline to complete the Rajput missions (125%). Sources of discipline include:
Mewar/Rajput traditions: 5% (the mission can be completed after changing to Rajputana)
Offensive ideas: 5%
Quality ideas: 5%
Advisor: 5%
100 absolutism: 5%
Policy: 5% (Weapon quality standards (economics/quality))
Hindu deity: 5% (Shakti)
I also had a random hindu meditation event which gives +10%. So adding all these bonuses gets to 145%! Once you have a high enough discipline and a big empire, give lots of land to the Rajputs and use their commands to get loyalty and influence up to 70% for completion