Admission in SASTRA University is based on merit ranking given by the university before counselling.
Stream 1: Ranking based on JEE Mains (25% consideration) + Intermediate Board Marks (75% consideration)
Stream 2: Ranking based only on Intermediate Board Marks 100% consideration
Basically to get a good branch in SASTRA University, stream 1 is comfortable but if you get a very extraordinary result in intermediate then stream 2 will help.