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.
How does an advanced lifter build bigger arms? Is it even possible? It is. If you're an experienced lifter who hasn't seen arm growth in ages, here's what to do.