The variation of the band pull-apart method has you doing regular reps, but slower than usual. This is more for muscle-building than improving weak spots or improving the role of the back in the bench press.
Depending on your objective, you can vary the approach. It's practically impossible to overdo pull-aparts, so use them often.
We all know building a muscular body takes time, but if you want to speed things up and kickstart some serious hypertrophy, you must make intelligent use of two core muscle-building concepts: absolute strength and absolute volume.