@ikim13 – I prep with Becker and supplement with Ninja MCQ and Ninja Audio.
BEC – Only Becker (until 1 day before when I discovered Ninja – for the last day, I used Ninja MCQ)
FAR – Becker + Ninja Audio (I really liked this Audio. I think it helped a lot) + Ninja MCQ (I bought 10 point combo (BOGO), but only used those 2 parts)
REG – Becker + Ninja Audio (This audio was a little tougher because REG is harder to discuss in an audio) + Ninja MCQ (I bought 10 point combo (BOGO), but only used those 2 parts)
AUD – (just started) Current Plan: Becker + Ninja Audio + Ninja MCQ
As for the amount of time – That is a question that nobody can answer, sadly. It totally depends on you. Everyone learns differently, picks up different stuff faster/slower, and has different skills.
I have only dedicated between 3 and 4 weeks of studying for each FAR, BEC, while working full time, but I've seen others on this board say they are studying full time and took 6-12 weeks. Everyone is different!
Is this your first section? If you have passed, I would use a similar timeline as you used in past tests. If not, 4-6 weeks seems like a healthy amount of time to dedicate.