Use a rope for this hybrid movement, which is part upright row, part face-pull. Do 5 sets of 20 reps and rest 3 minutes between sets.
Instead of standing upright, lean back a bit and use the weight stack as a counter balance. With the rope at the lowest point on the pulley, you'll then pull up to your face and chin area as you pull your hands apart. The entire shoulder complex is going to get hit here.
In four months I'll be a whopping 28 years old. I know a thing or two about training and all that goes into it, but I also respect the fact that there's a hell of a lot I don't know enough about, and other topics I need to know something about that I'm not even aware of!