If you are getting that many incorrect on LGs, I would definitely focus on following the syllabus through that section of the exam. I started off terribly with LGs, but after going over the study material several times and using the fool-proof method with drills every day, I scored 0/2 wrong on my last two prep tests and 165 on the June LSAT (My diagnostic was 154). That isn't my goal score, and I am also taking it in August, but I have seen the most consistent improvement with LG because I focused so heavily on mastering them. This is why utilizing prep test analytics is so crucial. Take advantage of that resource and take drills of the type of game you are struggling with the most until it clicks.