I like to use the Hammer strength machine for decline bench press. I feel like the restricted range of motion is safer on my shoulders, and I can safely go heavy without a spotter. I say heavy, but I keep the rep range at 10+, as most gyms don’t have 100 lb plates. I squeeze at the top to try to exhaust the muscle so I fail as close to 10 as possible.
This was at the LA Fitness in Irvine, where I used to work out while I was at Amazon.