Hi oa7,
First of all congratulations for a great improvement in your quant score.
Secondly, I am so happy to hear that you have been applying meaning-based approach to solve SC questions. Given where you are at - 73 percentile - you need to cement your methods in SC. I can see why you are struggling with making a choice between the last two choices in SC questions. If you cement your methods well enough, you will be able to improve fro, 73 percentile to > 85 percentile easily. I suggest you review
this video in which I explain how to do Stage 2 in Sentence Correction.
So that takes care of SC.
Now let's look at CR. Reviewing your post, I can conclude that you do not have a structured method to solve CR questions. Accordingly, you need to learn and embrace the pre-thinking approach. Look at Jim's debrief in which he explains how he internalized pre-thinking approach. Not only that, one of the students read his debrief and got further convinction into the pre-thinking process and scored a V40. See his post
here. Once you are convinced that pre-thinking is required to ace CR, view
this video in which I explain how you should prepare for CR.
I have shared a lot of information with you here. Take your time to absorb the same and feel free to ask any specific questions that may have.