well you could always do what our group did and have the paladin solo tank hummelfaust. :v (no seriously we did).

but just so you know theres no point in burning the fist two down faster as hummelfaust time till enrage starts the moment hes target-able (my group tested that) so its best for your group to save all the cool-downs they can (mind you hell still spawn and wipe you if you dont have those adds down in time so yea..)