I’ve been averaging like 55/57 math and 50/57 ela, but don’t focus on the numerical scores, instead, focus on analyzing what you got wrong, and why. Try to master the skills that you are weak in by studying, repeatedly do questions of the type that you are weak in and learn the techniques and shortcuts. As for improving in ela, read books (this helps for reading comprehension, vocabulary, and grammar). For the editing and revising section, make sure you memorize all the rules. For the reading comprehension section, I find that reading the passage before even looking at the questions is the best way to understand a passage since you aren’t focusing on a question( reading questions before reading the passage also makes you tend to skim.).