“Long story short-I have failed FAR now three times-each of the attempts I studied using Becker and completed the entire course in its entirety (3 separate times).”
Becker is definitely enough to pass “solo”. But maybe your problem is you are trying to do it all. Watching all of the lectures and reading the book again and again and again is a waste of time tbh.
“Is the NINJA MCQ package sufficient to pass FAR using it solo?”
Well, you wouldn't be using it solo, would you? You'd be building upon the knowledge you already have thru Becker. But trying a different provider that asks the questions in a different way could push you to where you need to be.
“I have been using it to do MCQ's at night during the week, than on the weekend,”
Good Good. Sounds like you are working while trying to study and pass (which makes passing harder – and makes the fact that you went through the entire BECKER materials lectures and text and everything three times insane). How much study time are you able to put in? and how long is your study period? Generally you don't want it to be too long or you'll forget the stuff you went over in the first half of the book.
“I have been doing progress self-tests in Becker just to throw in some variety.”
IMO this is the best use of your time. Don't re-read the whole book, don't re-watch all the lectures –> JUST do the progress tests. The progress tests are Becker's best feature and the mix of questions you get in each test (pro-rated by what they think are most likely to be tested) is super helpful so that the last couple chapters are not the only ones sticking in your mind. Your entire review phase of 1 1/2 to 2 weeks should be almost exclusively focused on Becker progress tests. And when you get a question wrong, UNDERSTAND why. The software will link you directly to part in the book and the portion of the lecture that talked about it. Use this tool.
My guess, is I doubt it is the review course's fault but more likely you are spreading yourself thin with work and are unable to really study as much as you need to within a period of time that will allow you to retain it. Some people are able to study and work at the same time but not everyone can successfully do this, it takes studying smart (INCREDIBLY important and something that a lot of accountant are terrible at because they want to cover and understand everything 100%), time management and prioritization and even then it will be very difficult for a lot of people.