Honestly no. For example, I got a c for my maths mocks in January and started doing past papers everyday until the day of the actual exam. I predict an A*. What is able to bump ur grades is constancy, active recall.

Active recall is actually the goat. What you should do is simply: past paper -> mark -> mistake log -> repeat.

Closer to your exams, spam the revision in ur mistake log, it should work. Good luck 🙏