It is difficult to predict the college on the basis of marks as it is highly unpredictable. The approach is better with the help of rank . there is no standard cut off for admissions in SASTRA. It differs from year to year based upon the competition. But, if we see the reports of previous years, the cut off might be around the rank 150 in stream 2 and it might be around the rank 400 in stream 1. However it's not the standard cutoff. It varies from year to year based upon many factors.
All the best