In the same exact spot as you, following for any gems of gold

For sure. I want you to remember that progress isn't linear. There are going to be up days and down days- I've been at this two years, so I have had my fair share of both. Also recognize that the way this test is structured - to improve your score you have to miss fewer questions (obvious), but the margin for error becomes smaller and well... its harder to operate within narrow margins. It just is.

One thing that helped me is narrowing my focus. You're at a 160-163 (Great work) your next focus shouldn't be how can I get to 170, it should be how can i get to 164-167. Eventually you'll work your way to 170 land. Baby Steps

So that touches on why your scores plateau and stay the same, Your post heading says your scores are going down, and while I don't know what your habits are like (full time job/full-time student/night owl/early riser). I'd like to charge it to BURNOUT (yes, yes everyone says it) which is a thing, and its hard to navigate. There's a whole lot riding on this score, and how could you not think about it all the time? (I probably am projecting here) but if you're thinking about the test outside of a study session YOU ARE NOT taking a break. So how does one manage: I personally like to dive into a world thats not my own by reading, or playing APEX legends or just exercising and pretending that my lungs aren't on fire. A healthy separation from this test is crucial.

Okay so thats the mental piece which isn't directly LSAT related, how about actions you can do on your PT/Study Session? One thing that helped me is that I remember that Volume isn't always best. Quality is KEY, it does no good to do two timed test a week, if you haven't blind reviewed well/ at all. Another thing I've noticed is that the way you do blind review is just important as doing it in the first. If your blind review consists of you just picking another answer and not explaining why that may not be helpful.

Really good blind review (for me) consists of explaining why the wrong answers are wrong, the right answer, and the elements of the question that could trip me up (Was there verbose language, was "unless" or a pesky "only" in there) really break down why you got something wrong and what contributed to that error. Then really expand on that to large themes to review: it could conditional logic, finding an another, reviewing Bi conditionals, anything really.

A final thing that helped me even now was to really love and appreciate untimed sections and getting into the thick of question types. It removes the most stressful constraint (time) and can serve as a really good indicator of your progress/strengths/weaknesses. I don't like absolutes but if you're going 20/25 on an untimed section that may suggest that there is a gap somewhere or at the very minimum you need to review something.

Kudos if you've read all this, I apologize for the length, but this really resonated with me.

Now for some disclaimers: I am not a genius/master of the LSAT and do not hold the keys to kingdom (still here after two years, so that says something) everything here is based off bumping my own head and going around the block. Yes, there are several necessary assumptions (LOL) I've made in writing this but C'est La Vie

Best of luck on your journey - see you on the other side

Chris