For everything in 5th Set for Powerlifting, there is a reason. Swede didn't mix together various training concepts at random, just compiling programs until he found the right one. 5th Set was developed out of necessity, and polished through the willingness to question the correct place for intensity, volume, technique, and hypertrophy work in a training program. Your success with 5th Set doesn't rely on constantly pushing intensity, or increasing volume every week, or so much hypertrophy work that size increase takes care of strength increase. It uses all of these things, together, with intentional purpose and programming. It is even self-regulating.