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.
You can learn a lot from competitive powerlifters. But you can also really screw up your progress if you follow their "rules" blindly. Here's the cold hard truth.