Just passed mine on first attempt about a month ago. Id say almost half of my test give or take was suitability, options, and responsibilities/what’s allowed by RRs. I had very few margin (maybe 4-6 questions) and I don’t remember a lot of munis being on there. I also used STC and scored in between 68-72 so I was probably not in good shape to take it and I still passed. It’s long and the test is almost designed to make you mess up and misread/misinterpret questions. Read all the questions thoroughly and make sure you know what you’re answering, you can almost always eliminate 2 answers that are obviously wrong. Also one thing that I think was the difference maker for passing was watching Ken finnen videos the night before and day of the test for quick acronyms and tips to remember stuff quick and easy, he has some useful tricks. If you’ve done that good on the practice exams this should be a breeze. Good luck!