These two partner assisted pull-ups are a great option to ensure full-range of motion and individually based assistance.
Most lifters struggle with finishing the movement by getting their chin over the bar. Although many use bands for assistance, a band won't help you where you need help the most: at the top. Also, partner assisted pull-ups allows the person that's assisting to dictate how much help is needed.
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.