@ rishi
Frst of all , let me to clear about that iit is the top engg institute in india , so, it cannot be comparable with iiit and thapar .
and if you are getting low rank or newly opened iit , then u have to choose the top rank nit with your preferred branch ..
and if you are not getting iit and only getting low rank nit , then u have to go for thapar ,
thapar is the best comparable to iiit , but iiit allhabad and delhi is the best than thapar , rest are not that much good compared to thapar .
SO, IT DEPENDS ON WHICH COLLEGE U ARE GETTING IN COUNCELLING , KINDLY MENTION THE NAME OF ANY PARTICULAR IIT , NIT OR IIIT BRANCH IF U WANT TO KNOW THE BEST OPTION AMONG THEM .
and your 2nd query are not clear to me – strategy to go to iit means ?? u want to know about the study strategy or other than that >???
KINDLY MENTION THE SAME IN THE QUESTION ..
ALL THE BEST ..