IIT Mandi - Indian Institute of Technology

First of all congratulations! I will recommend you to go with CSE from IIT Mandi, but in that case only if you have a keen interest in computer science and engineering. Placement wise it's very good also you will get very good exposure. IIT Mandi has very good semester exchange program too, you have a very good option there to go abroad and explore further. Else if you wish to go with core opt for the other options which are left.

Among your choices, DTU IT is a very good option unless you want IIT brand attached in your CV.

Check the links below for rank and college prediction :
https://www.resonance.ac.in/jee-main-answer-key-solutions/jee-main-2016-rank-predictor.php
https://www.shiksha.com/jee-mains-college-predictor
Stream should always be given preference (doesn't mean you join any college) because that is what you love and want to make in career in so choose the desired stream and then opt for college accordingly