There are a lot of strength athletes and powerlifters who need to emphasize overhead work. I've never seen a big bencher with tiny shoulders. So it's important to pay a little bit of attention to them. You need higher-rep seated dumbbells presses. Using dumbbells strengthens the stabilizer muscles compared to a barbell, and that will transfer to your bench press.
Go for high reps, 15-20 per set. This forces you to not go too heavy, as the delts are mostly comprised of a lot of slow twitch muscle fibers.
You can also play with angles here regarding the degree of incline you press from. Just don't turn it into an incline dumbbell press and call it an overhead dumbbell press.
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