Scored 166 blind — how should I study?

I took a blind diagnostic LSAT last week and scored 166. My goal is 175. Since then, I’ve been studying the LR PowerScore Bible, but it just feels… redundant/ineffective? To me, it unnecessarily complicates a lot of simple principles and doesn’t feel very effective. But maybe it’ll still help if I work through the whole book? Should I stick it out, or is there a more effective way to study? I’ve considered 7Sage, but I don’t want to spend a lot of money on a study tool only to find out it doesn’t do much for me.