Dear Aspirant,

You can get seat in sastra if your +1 and +2 marks are also good  because they take admission by considering 70% JEE score and 30% of the combined normalized result of +1 and +2. When coming to dhirubhai ambani university, they take admission through your JEE score or by your grading in GUJCET.There are high chances for you to get into dhirubhai ambani university if I  consider you that you are of OBC category.

check the link below for your further clarifications:

https://engineering.careers360.com/articles/daiict-b-tech-admission

ALL THE BEST.