Definitely brush up on COSO, IT, variances, CAPM, break even analysis, and operating cycles. Becker’s IT questions don’t come close to the actual thing. Luckily for me, I’m pretty with IT concept so the actual IT questions were a breeze, but I would suggest you use Ninja MCQ and do practice quizzes of 30 for COSO and IT only. Do as many practice sets as you can, then sprinkle in variances, cost accounting, etc.
“An investment in knowledge pays the best dividends” - Benjamin Franklin