Want a big bench? Train rear delts and upper back!
All UNIVERSE bench presser Scott Mecham shared with me some important assistance lifts for the bench press: rear delts and back. Well he is built like a mutant cobra AND benches over 800+ weighing 240 lbs!!! I would listen to what he says.
The above video is a nice superset of reverse flyes and Kelso shrugs made popular by the immortal Paul Kelso.