How bout giving bards a Misdirection ability. An ability that can be cast on an ally that causes all of their enmity to be redirected to the ally.

E.g. Bard Cast Misdirection on Paladin, Bard AOES trash back of 8 mobs immediately after.

I've seen the ability in other games and think it would be pretty sweet if we got one in this game. It would make things drastically more manageable.