Well, we are in the same boat. I’m from a banking and finance major without a very quantitative background.
However, I think that I can invest the time i spend on APRM on the concepts of PRM which are more advanced and learn you better. Moreover, APRM doesn’t add value as PRM and FRM. Finally, I think exam 4 is the easiest exam. I would take APRM if it exempts me the exam 1 or 3 but not the exam 4.
Bottom line: you know the best for you and good luck whether you decide PRM or APRM.