How to improve CASPER to a high 4th quartile?

I got a 4th quartile this year but it wasn't enough to secure mac with 3.91/129. I'm guessing it is bc my casper was too low within the 4th quartile. How would one improve to get a high 4th quartile? I practiced for a month for this cycle's casper and felt good when answering the questions (left none of them empty and tried to give nuanced responses). I'm not entirely sure how to improve from here.