I'm so sorry I realized you just said you didn't have those materials. My bad lol
no problem - I mean I own them but I've lent them to a coworker who is also prepping for the April exam.
To me - yes, if I'm ranking between the 4 you listed, my ranking would be: ACI MNL 15, SP4, ASCE, CMWB. Of course, I believe the two ACI are significantly more expensive than the other two (my ASCE was free as we have it at work). MNL-15 is a collection of standards and when I took the exam I spent the most time in that reference. I would focus on familiarizing yourself with ACI 301-16, 305, 306, 347(see below) and 211. The first 3 were heavy on my exam. All of these are contained in MNL 15. But, since the book itself is listed, I would think everything in it is fair game (although some of these selected standards are a bit niche and I wouldn't expect a question on some of them). Also remember, this is a reference. You don't necessarily have to memorize or read it all like a book. I would certainly read through the sections I listed and get familiar with how the info is presented as well as where some of the sections are (ie, 301 Structural Concrete has info on reinforcement bending requirement, 305 Hot Weather tables, 306 Cold Weather etc.)
SP4's main focus is ACI 347R Shoring/Reshoring. It's included in the publication, you do not need to buy it separately even though NCEES lists them separately. But, there are also some good tables in there for formwork design/bracing calculations. If you're not taking a review course, I would recommend finding some good YouTube explanations on this topic. The topic itself really isn't difficult, once it all clicks in your head. However, this was not a topic I had ever seen or heard of prior to my preparation so it seemed like a daunting task at first. One big benefit to the purchase of SP4, is you get access to the Shoring/Reshoring spreadsheet. The spreadsheet has a couple different scenarios in it that you could play around with in spare time. But the most beneficial part, in my opinion, is you can print each scenario out with enough space in each to write out what is going on in the "Stage" and then write out the load combinations to match the spreadsheet numbers based on the load ratings. You may only see one question on this, but you might see 3. Who knows. I probably couldn't solve a problem right now if you threw it at me cold, and I likely will never see it in practice.
I decided I was not going to purchase the CMWB. I believe the info here falls in the Temporary Structures section of the NCEES breakdown (don't quote me there). There 7 questions on the exam, and 6 topics listed. I figured to expect 1 question on each topic and then a wild card. I had anything masonry marked as a "wing it/check CERM/screw it and guess".
Good luck! If you have any questions you can DM me. I'm no expert but I'll do my best to try and help.