Hey Joseph,
Thanks for the reply! Ok, I have several thoughts here, in no particular order.
First, you read the books a single time—did you get much of a chance (or any) to review the ideas or to go back in the books and read portions multiple times? With over 1000 pages of fairly dense content at times, my concern is that you got a lot out of the books, but not everything. and, that secondarily, what you did get wasn't emplaced at the level you'd typically want to see. That would in part explain why under the pressure of the real exam you ran into some problems. It's something we see in the LSAT courses—students who retake them often tell us they learned a bunch of things they missed the first time, and hadn't even realized we were discussing. The Bibles work the same way, and I've had students scoring in the 170s tell me many times that the second and third readings of the books made a big difference to picking up critical but small details. Going back into the books might help significantly with steadying out your performance, and in particular they would address this point you made: "I tried to remember the strategies for each type of Qs." To me, that's a warning sign; you shouldn't have to remember anything, and it should be automatic for you. But, given that you read the books once, you're probably doing pretty well all things considered!
The prior point makes me think that you might also be helped by grabbing the LSAT Bible Workbooks. Those expand on the ideas in the Bibles, and help drill them into becoming second-nature (which, regardless of the system you use, is absolutely critical for success). They would also help really see how well you knew the range of concepts. I've been thinking of creating a series of tests for each book, but until I do that, the Workbooks are the ultimate "prove it" tool for showing that you have the ideas down.
Before talking about some of the other options, I'll make a general comment about preparing. One of the things that is a benefit to students today is the wealth of options out there. But, one of the concerns that everyone who does LSAT prep has is that those options make it easy to simply jump to another approach before really learning the full scope of the first system. I've seen students do this with other approaches and then jump to ours, so it's not really a complaint more than just a note about how people study
It's something I think you should consider as well, because from everything you've said, I'm concerned you might not know our system well enough yet (for example, you should be able to absolutely
crush Parallel Qs if you use the techniques properly). Continuing on with it might make you better, faster, and the quote that comes to mind is from Bruce Lee: “I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times.”
Anyway, please feel free to ask me about any of the above. I'm happy to help!