I used Becker for FAR and WTB for all other sections. I'm using Ninja MCQ for my 2 retakes. I personally don't think Becker is worth the money. If someone else is buying it for you, then, sure, go for it. But, if you're buying it yourself, use the Ninja MCQ's. They are the same questions as they all use the licensed AICPA questions. Then, use the free resources to make sure you aren't just memorizing questions. Becker's lectures are basically reading the book. Not all that helpful and any mnemonics you learn in Becker, you can get in the study groups here.
FAR 82
REG 76
BEC 71, 78 (There is a light!!!)
AUD 69, 83 (DONE!!!!)