Great. Your detailed descriptions for SC content and CR traps indicate that you learned something there—you'll be less likely to fall into those traps / make those same mistakes next time.
"Need to know" for CR/RC is really more around process, since there are no facts to know—so things like "On Weaken, it's only necessary to find something that makes the argument a little less likely to be valid—the correct answer doesn't have to completely kill the argument." Go back and look at those again with this in mind (this can also overlap with the "trap" category—so you may have already found what you needed there).
RC. 3 inference—okay, that's a pattern. Review RC inference in the book. You can also search our blog for the word "inference" for more. (That search will also pull up CR inference—but if you're making mistakes on RC infer, then it's good to review CR infer too.) Here are some to get you started:
https://www.manhattanprep.com/gmat/blog ... rehension/
For the 5 in a row, analyze what was going on with the individual questions. Is it the case that you were doing well beforehand and just got a lot of hard ones in a row as a result? (Did you start with 7-8 levels each time? If so, that was at least the beginning of it.)
But then what happened—did you spend too much time and / or mental energy and then start to get fatigued and or nervous and then maybe may a careless mistake or two towards the end of that set, even when the difficulty level came down? The remedy for that, next time, is to recognize faster when something's too hard so you can cut yourself off; you're going to get those really hard ones wrong anyway, so get them wrong faster. Then you won't be so fatigued or tight on time when you get back down to a level that you can handle.
Alternatively, was there a hole in knowledge or some process issue or whatever on some? Plug that hole and, next time, you won't have 5 in a row. Though note that you'll still have some of those wrong. Maybe even 3 or 4. That's okay; you're just trying to break up the long-drop.
This will be my last post (sniff) here this year—but Sage will be on for me starting next week and he will continue to help you. Good luck with your studies!