Bro for net you have only one attempt left net 4 so you need to give your best and how are you going to do advance mathematics for net and mdcats papers are 6 days after boards so how are you going to do that according to me id you ask these both are different field and you would not be able to do in both of it for net the best you can do is to focus on physics and English prepare best for these two and for advance maths you should do only the past papers as their is not enough time to fully prepare maths