Well considering it was ST and there is only one tank per party then there are quite a few variables. Healing doesn't affect enmity on the tanks unless one is at the top of the table and a tank provokes. Say the enmity on the whole alliance is on tank A and heal B would overheal and grab enmity (cure 3's do this particularly well) then tank B provokes, grabbing aggro to save his healer for over healing (stupid healer) it's harder to grab aggro back even with provoke. But at that point the variables set in. If team B has a SCH that pops selenes skill speed tank can pop more enmity combos than tank A increasing his enmity above tank B. Not sure if bards foe increases PLD aoe or silence power but if it does then boom higher enmity. Might not be a while lot compared to RoH rotation but any bit helps