Big ups for making it this far. R2 year is a grind.
There's a lot of different ways to skin the Core exam cat. (caveat my advice is 7 years old at this point). One of my former co-residents (/now practice partner) did pretty much what you're suggesting. He finished all of RadPrimer before the test and used CtC on the side. He passed and says he didn't regret his studying method.
I personally couldn't stand radprimer and only used it sparingly. I really liked the "A Core Review" study guide series. Most of the sub-specialty books were really good. Few, like mammo at the time, were outdated or just bad. This series is question based, similar to Rad Primer, but i felt like the questions were much more geared to what actual Core exam questions are like rather than RadPrimers "lemme ask you something super esoteric just so you can read the long ass explanation". I felt like it was much less of a pain going through "A Core Review" questions than RadPrimer.
I did use CtC as my "first aid' of sorts where I had written all my notes in... as well as going through CtC 3-4 times I think.
For more question banks I also used Board Vitals and Qevlar. Check with your seniors if those are still useful. Qevlar, while not a great question bank overall, was Iphone/Ipad friendly and was nice for knocking out a few questions while standing in line at the grocery store.
For physics I read the Huda physics book, CtC War Machine and then attending the in-person Huda physics course.
By no means am I suggesting you do everything I did. A lot of the study prep depends on your baseline radiology knowledge, which sounds like its pretty good if you've been studying steadily for 2 years now. I would throw in: don't overlook regular studying/reading during R3 year either. R3 year i started getting subspecialty rotations like body MRI and cardiac and R3 year is a good time to read a book or two in those categories.