Can't the single factor program work time and again? I don't see why a person couldn't simply break for a week to recuperate, then hammer away at it again, starting a couple notches below where they ended up the first time. For example, for AB, starting back at week 9 or 10, then ramping up weekly from there. He's guaranteed to break week 13, which gives him a solid 4-5 week training plan anyway that he can probably milk growth from, since repeating loads does tend to allow more mass, and chances are he'd continue to break PRs for another couple of weeks, no?
I've heard it said many times before, that DF type training is only really needed near the very advanced and elite levels, and that most recreational lifters really don't need to bother with it. This is just what I've heard, though.