Recently, I was asked this question from an IIT JEE aspirant,
How should I prepare during the last 6 months for JEE Advanced in order to get a rank of at-least 4-5k?
This was my answer,
First of all, targeting a rank isn’t a good strategy. It is better that you give your best and appear for the exam without any expectations.
Anyway, assuming that you are confident with JEE Main and have only 6 months left, I would suggest you, work on your strengths first. Believe me, if you can work out 40–45% of the paper correctly, you can fetch your desired rank quite easily, and to do that you don’t need to be an expert in every topic.
On the exam day, pick up the questions based on your strengths, no need of attempting too many questions. However, it is important that your basics of almost all the topics are clear and that you can tackle easy or moderate level problems in those topics, because sometimes easier questions may come from the topics which you didn’t prepare that well.
Also, there are no chapters which is as such the most important ones. Since you have 6 months left, you have time to look into your weak spots too, but don’t neglect your strengths as these will be crucial in fetching a good rank.
Give as many mock tests as possible, it is of utmost importance.
Finally, the marks vs ranks scenario depends totally on the difficulty of the paper each year, so no point targeting a score for a particular rank.
Give your best!