Any Amity University campus will take you on a 100% merit-based scholarship (only for tuition fees). They offer 100% merit based scholarship to candidates with over 93% of marks in 10+2.

However, I am sure you will get a better chance with your marks at a better place.

Regarding the 100% scholarship of Amity University, you do have to maintain your grades to retain the scholarship for the subsequent years.

Ive been to Amity Lucknow (I did not graduate though). I can tell you that it is not the best university around, but neither is it the worst. Keep it as your last option among private non-entrance based universities for Engineering. Amity is good at times given they do get bursts of on-campus placement offers (if you are looking for that sort of a thing in a college). A few years they get lot of companies and sometimes, there is a lull.

So take a wise decision. There are better colleges/universities, but as I said, Amity isnt by any stretch worse. It is just a commercial university with plenty of perks and average to better than average educational standards (depending on campuses).

All the best.