First of all marks of class 12 does not matter any more so let's talk about only your JEE MAIN score…..

you can get low ranked branches in good NITs like NIT SILCHAR ,NIT JAMSHEDPUR(if you have Jharkhand home state quota), NIT AGARTALA

You can also get average branch in average NITs like NIT SRINAGAR,NOT GOA

You can also get good branches in low ranked NITS like NIT MIZORAM,NIT MEGHALAYA,NIT MANIPUR,NIT NAGALAND,NIT PUNDUCHERRY etc

P.S. - Above data are for obc students

for SC ST students “MAUZ KARO”( have fun) you are going to topmost NIT with good branch

and for general students “bhai life muskil hai aage”(life is difficult brother )