hi,

see sastra university is one of the best university in India. every year numerous students apply for sastra university, cutoff score changes every year, depends on some of the factors like stream of engineering , number of applicants etc. 30% seats of total seat of b.tech course is fills by 10+2 course score. however it is quite difficult to predict the chances, however you should apply for both of the stream of application, stream 1 s evaluated by jee main score + 10+2 score, stream 2- only 10+2 score.

hope it would help.