what a drastic change will it make?

I am a dropper..I scored 95 marks in 2015 then in 2016 195!
currently a student at NIT hamirpur CSE!!

Is dropping a year good option? Since 2 years dropper didn't did any well as the average is just 77 and 1 year dropper just excelled nearly 15 marks extra than previous year.
So, I think better to join any college and devote a year in full self study. Go with the JEE materials you have got and keep time for both college and JEE preparation.
Yes, you must cut your contacts with the outside world for one year. be in contact with patents.
and at last, don't lose hope. believe in yourself and do hard work..that will surely pay off.

when you keep two options with yourself it means you are doubting yourself..what I believe is that do one task at a time...there are some freinds with me who prepared for the JEE exams along with college but the result was not satisfying..they need to continue with there current institute..JEE score was too low though they cleared the cut off but they won't be able to get a better nit than current...and college is the thing that matters a lot for your career...kindly spare one year so that you can get a better institute.