I got an 800 on the June test by studying with both Dr. Chung’s and Barron’s. The actual test wasn’t that similar to either, but I think just doing as many tests as I could and analyzing my mistakes helped me to not make the same mistakes. After a lot of practice tests, I started recognizing different types of problems/strategies, so on the actual test even if the problems weren’t similar I could still use the skills I’d picked up from practice. Good luck!