hi,

see you have scope for nits, however till now it is difficult to predict about cutoff score, since more of the sessions are left of jee main exam. now I understand your concern and it is  best to change from tier 3 college in perspective of your better career. however jee main counselling would start on june or july and that time your second semester exams would held according to majority of indian university schedule. so right now you have to pay the tuition fees if you do not lack the year. but if you are determined that you would certainly get a better college than this then you should not pay the fees, even if based on this year jee main score you get a tier 1 private college it would be much better for your career. hope it would help.