Hello, 

Well the IIIT Hyderabad conducts its own counselling based on JEE Mains marks. It's arguably the best college in India accepting JEE Mains marks. Moreover, CSE is the most in-demand branch of engineering. As you may know, the counselling has started. You can only get IIIT-H if you have rank anywhere below 600. You can now calculate the percentile required. There are 4 rounds of counselling and the closing rank might stay around 750-800 not above that. I hope it helps.

Thanks