60/5 is 12. So you are doing 12 exercise per gym session? To me that seems excessive.
Chest/Tri:
Flat bench
Incline bench
Decline bench
Cross-overs
Flies
Dips
Skull-crusher
A cable tricep move
Anything else to me.. seems excessive. I don't count abs as sets though. I do as much as I can as my rep targets are very high, then I take breaks until I can continue.
It's just my opinion but if you are only resting 30 seconds and your workouts are 2 hours, you are doing too much.
Resting 30-45 seconds chopped about a half hour off my workouts. I take extra time as needed. Resting 60 seconds is what was stretching by workouts to damn near 2 hours.

made the workout much tougher but shorter in length.

this mess gets upped when i have a research paper due on the same topic

