If your anterior and medial deltoids are overpowering, try starting your next shoulder workout with this. Starting your workout with an exercise to target your weaknesses will help fix muscular imbalances and reduce your risk of injuries and chronic pain.
The seated position helps isolate the rear delts and forces you to engage your core to prevent cheating during the movement.
Do 4 sets x 12-15 reps. Stick with a moderate weight – it's not a compound movement and you don't need to go balls-out and use the whole weight stack.