Rhomboids are a weak link for many lifters. Target them like this. Use a close grip attachment and pull down to the sternum. Flare the elbows out at a 90-degree angle.
Heavy bent-over dumbbell or barbell rows are still best for building an impressive back, but the rhomboid pulldown is a great finishing exercise for adding more volume without taxing you as much as the bigger movements.
Use a V-bar or close grip attachment and pull down to your sternum while flaring your elbows out at a 90-degree angle. Keep your trunk stable to prevent excessive rocking.
I've come to the realization that not everybody is interested in entering powerlifting competitions, but they are interested in improving their training by using powerlifting concepts. So here are a few things I picked up in the powerlifting pits that you can use to reach whatever lifting goals you may have.