hey , you have 60-70% chances of getting into delhi engineering college or PEC as this year majority of the students have scored above 90% . Still , I will say that you have pretty much good chances to get into the big engineering colleges for cse .
I will suggest please wait for the application forms to get released fill the application form wait for the merit list to come out and revert back with your merit rank . Only based upon your merit rank we can predict the best college for you.
Meanwhile , you can check the other questions answered on this website related to CSE branch . That will surely help you get a idea of the competition you have in JK pmsss scholarship scheme .