so you base your progression in bodybuilding by strength increases. why not just train as hard as fuck...
nothing is "efficient" if you are lazy, It doesn't make sense to me to try and chase rep numbers,
I have tried that before and I think subconsciously, people will take a little longer rest or break form a little just to get that extra rep or 2, so you can tell yourself you have progressed.
I found that when I threw the diary away, my intensity went up and when you don't have to worry about chasing the numbers, the rest times shorten, and when your in the zone, you can throw in a random drop set or superset just because you feel like it at the time.
Also if you start getting a niggle or pain, you can switch things up and do different exercises or rep ranges, having this freedom, saves potential injuries...
this is my way of thinking, I don't think juice is some magical thing that changes the way muscle is made. it just makes it more efficiently.