@Ralph_s6, personally, I started doing random, but I felt like I wasn't making process. I went through them quick whenever I started going by category. I do plan to do the random sets after I hit review phase, I don't think there is really a right or wrong way to attack the questions….
AUD - 1st - 60 (12/12), 61 (2/13), 61 (8/13), 78! (11/15)
REG - 55 (2/16) 69 (5/16) Retake(8/16)
BEC - 71(5/16) Retake (9/16)
FAR - (8/16)