o level math bellcurve + how to uncook myself

hi guys, i have been reading through past threads and apparently the o level emath/amath bell curve for A1 is usually in the high 80s range(>85%, 90%).

for context, i've been doing lots of tys paper and prelim papers since the start of the year but i usually fall within the 70-80% range for o level papers (its usually my p2 pulling me down) i really want to do well for both maths to pull up my l1r4/5 as my other subjects are really cmi, so i would really appreciate if there are any tips to brush my amath and emath to safeguard an A1? 😞😞

im literally so cooked for other subjects esp pure science oh my god. i havent gotten back my prelims but i know i fucked up so much, and its so demoralising because its only ONE MONTH TO Os and im only getting borderline passes. (also im from a low cop neighbourhood school, express <190.... so i doubt my prelim papers are that hard as they'll prob set it around O level's standards)