I am getting my ass kicked lately on my chest days, and I have been working diligently and trying to add more reps to my incline and dumbell presses without any success. I am fatiguing early and not getting a full work load done with chest. My chest is the one thing lacking on me, and I try to hit it with a variety of angles and exercises from ones listed here and in mags.

I was using the Smith Machine for decline and incline, but moved to the power rack in order to get more out of the stablelizer muscles and to be able to incorporate the dumbells more. I can lift heavy...but only for a few reps. I have lowered my weight, but don't seem to be getting anywhere near the same type of muscle fatigue I used to a couple months ago. Suggestions?

Usually I do this in different orders.
Incline- 4X10-12
Flat Dumbell- 65lb's 75lbs 85lb's and 90lb's
Cable crossovers
Decline Dumbell
Dips with body weight

I crap out on the bench and inclines way to early.