Going to assume that left side gear difference isn't an issue.

My WAR co-tank runs the higher potency combo, and once told me that there were a few times he "backed off slightly" because the aggro bar was getting really close. That day was the last day he ever ramped down. I asked him how do I know how to stance dance optimally if you aren't playing at your absolute fullest? I told him that if he rips hate off me it is MY FAULT, not his. (with exception to the triple crit fell cleave - which is nobodies fault).

Since then I have lost hate as a PLD once to a double crit fell cleave, a handful (less than 5) of times under normal circumstance, or if I derp and pull in SwO and stay there.

I have lost hate as a DRK only on the dreaded, but loved triple crit fell cleave.

Almost without exception, any time I lose hate, it has to do with me pushing my boundries and my groups boundries on stance dancing.

If you need to tell a class to play sub optimally, then you aren't doing everything you need to be doing and you need to look inward to what you can do better. (Yes, even with PLD's issues right now)