Hi,
Sorry about your result. I dislike CP and honestly didn't care that much if I pass it or not - I am unlikely to ever practice it. Having said that, I did train in AP/CP and I wanted to give it my best shot. Here's how I memorized all this useless information.
Blood bank - probably my favorite part of CP. I listened to Joe Caffin's lectures on youtube which are great and I think are adequate for the purpose of passing the boards. Practice panels too - they are time consuming but they have a logic to them.
Micro - ASCP lectures plus Ahmed's questions. This was the only section of Ahmed's book I completed entirely. I made flash cards for most bugs as well as most culture media. I actually wrote them myself by hand instead of creating a pdf. The idea was to add an extra step in memorization. Seemingly, it worked. I paid attention to common bugs, as well as mycobacteria and fungi. Didn't get to the parasites.
Chemistry - in our program we have a dedicated board review rotation, and our chemistry director went through a lot of high yield topics with us. That was about it. I attempted studying chemistry myself (ASCP & Ahmed) but it wasn't very successful.
Heme - I felt comfortable with B-cell lymphomas and flow so I didn't study that. The rest was the WHO book. I also listened to the ASCP lecture on reactive lymph nodes. Heme was another topic I made flash cards on, especially leukemias, translocations and T/NK lymphomas.
Lab management - know basic legislation and billing (Medicare, bundling etc). Practice "break even" type of calculations for new tests/equipment. Those were useful. Know basic statistics (sensitivity, specificity, PPV/NPV type of thing).
Molecular - I went through the method descriptions for most molecular methods to know their applications and the basic concepts. I made flashcards for translocations (soft tissue, heme as above, renal tumors etc).
I went through my flashcards repeatedly in the past weeks before the boards. I cannot remember most of it now, but I am ok with it. I did not use the compendia at all, they just didn't work for me. I believe heme was the highest yield, followed by micro and blood bank.
I hope this helps and good luck on your retake.