What should be strategy for JEE dropper who wants to improve scores from 96 percentile (in all 4 2021 attempts) to 99.5+ in 2022 attempts?

I have already identified close to 22 topics from all 3 subjects where I lack strong conceptual understanding. Will taking help of online freelance experts help as I need be exam ready again in just 3 months as first attempt may happen in Feb 2022. Also which all mock test series can help further?