For background, I've taken the LSAT twice and scored low 160's both times (albeit my second score was significantly lower than my PT averages). For the last 10 PTs, my average score is 169, peaking at a 175. My average performances are -3.4, -2.3, and -5 in LR, LG, and RC respectively.
I know what I need to do to better my LR and LG scores and I've gotten -0 on these sections before. The issue is I have no idea how to approach RC. My best was a -2 and I don't think I can reach -0 with my current tactics. I've gone through all the curriculum and am stuck because I feel like the only way I can improve in RC is by reading faster and being more attentive. I always aim for the big picture and the low resolution summaries slow me down considerably.
If you have a strategy for RC, even if it is unique, I would love to hear it! This is especially true if you have a strategy/strategies for specific question types on RC since I would love a more focused approach.
If you took the prep test before starting the curriculum for your baseline score, then you don't need to take another PT until you've completed a majority of the curriculum (including RC and LG). If you want to know where you're at- no offense as this applies to everyone including myself- you're probably not where you want to be. Keep studying and once you have some mastery over the material as a whole, you can start taking PT's to see what you need to go back and review. If time is your worry then do some problem sets to see your speed.
P.S. These are my personal thoughts and I'm following this strategy as well. Feel free to disregard and good luck with your studying!