You might be able to benefit from warming up more thoroughly. I'd drop the shoulder presses and not hit delts twice a week. They get stimulation from chest and back exercises, too. I haven't used hGH long enough to say if it helps with my joints, but it helped me heal after shoulder surgery.
I'd definitely consume plenty of fish oil and not abuse aromastase inhibitors or cortisol blockers.
Here is a great article about warming up so as not to cause more damage.