Hello aspirant. Firstly 81 isba good score. Congratulations on that. Secondly, 95 percentile is not that hard to score. If you start from today. You have solid 1 month in your hands. Now, if you start with topics and all, you will run out of time. So, go for solving papers. It can be topic wise, it can be mock. As many papers as you can.

1. Prepare a formula list for maths and physics.

2.Prepare a reactions list for chemistry and also formulae list

3. Each paper you solve, Mark the questions which you don't know and also the questions which you did wrong.

Go to that particular concept and learn that. This way, you will know the concepts and solve the problems

Don't repeat the old mistakes, make new ones.

First, start with daily schedule . Plan your time. Putba schedule,  this should be done this day something like this

Hope this helps

Regards

Nikhitha