Something id like to add as well is that you have to have at least one point of hate on a mob for things like Rampart or Sacred Prism cure to gain hate on the mob. Even though its an AOE hate tool.. if you don't at least have green hate it will not increase your hate on that mob. I have learned this from Moogle king. i have to throw a flash to tag the king before using a self aoe hate tool. It may work in reverse as well. If a party member has not tagged the mob and you use rampart.. it may not generate enmity for that one member. That may be why as an earlier poster mentioned he looses hate to a THM's Lightning combo in the beginning. Just make sure everyone auto attacks the mob first them abilities.