i am a student who passed 12th this year. my iit jee rank is so high that i cant get admission to top 6 IIT's. but my bitsat score is 351 and i can get admission in bits pilani. i have also qualified ISAT and can get admission to IIST . so which college i should take????

Dude, you forgot to state the most important aspect...Your interest.

Well, if u are interested in coding go for CS pilani

If aero, go for iist,

If electronics, go for pilani/iitg

if sports,extracurrics all round development and/or doing mba go for delhi/bom any branch

If civil services delhi any branch + coaching in delhi

Just my opinion..Hope this helps :)