Hello Aspirant,
Scoring above 99 percentile is not a hard nut to crack. However, it requires consistency. You must be dedicated to achieve what you aimed for at the beginning. You have to plan a strategy to study and then follow it obediently. You can must give equal preference to all the subjects and practice regularly. Previous years' question paper will give you an idea of the type of questions asked in that exam. So, keep doing your study regularly and be focused on your aim. That's what is needed for being top performer.
All the very best!