I'm really not sure, but I threw on a bunch of HQ PvP accessories (ilvl55) alongside my lv90 PvE stuff... immediately it seemed like I was both taking less damage and doing more, despite the loss of intelligence (SMN).

My concern though is putting on lv55/70 gear in the other slots is going to drop my HP a lot. Is it going to be worth it to take such a substantial ilvl hit to gain Morale? All the lv90 pvp gear requires rank 30 and that's still a waaays off.