Are effective reps legit

[TurboGainz]

I just found this post

Effective/Stimulating Reps and Double Progression

CT has shared this image before, [effectivereps] If you do 5x3-5 on your main lift and you have an assistance lift that hits similar muscles and you use 80% of your 1RM on your main lift I’m certain you could find a suitable way to program your assistance lift (rep range/load) where you’ll average 20-25 effective reps per session. Recently I’ve used a similar approach (still sketching it out) to reason about the load and rep scheme for my main lift (I don’t really have the attention span for…

So I guess going to 3RIR is good to get the most out of the set without a ton of fatigue