SMEAT

Sastra won't considers any EWS type. They will consider AIR ranks only. Maybe it's difficult to get a CSE seat with your score. If you are more preferable to college and don't consider any branch in first year. If you avail 9 GPA in 1at year. You can change your branch from anything to CSE.

No chance , your chances are very low not even in trichy but in all NIT'S.

Your expected JEE Main AIR is about 139178, Which is very good enough for getting admission in Amrita Vishwa Vidyapeetham in desired engineering branch.

May be you can expect M.Tech. But don't be sure about that. Wait upto last counselling.

You can get any seat definitely in sastra wait upto 3rd counselling after attending 1st counselling. You can get a better branch seat. As you didn't mention any priority of branch.

I think it won't be sufficient to get a CSE seat in SASTRA. If your JEE AIR rank is below 30,000 you can get a CSE seat.

Yes, you can get any branch seat in sastra easily. Apply for stream 1 includes 75% IPE and 25% of JEE score.

If you are ready to take any branch seat maybe you can get something in 3rd counselling . But you are expecting ECE seat which is not even possible . If you want to apply in stream it requires 970-985 marks in IPE and the Jee AIR rank has to be in below 40,000