As it is currently, there is absolutely no reason to use any composition of classes besides 4 marauders for HM operations. Not only is their dps excellent, but with 4 mara's the group can roll "constant" bloodlust to maintain max group dps. The best solution is to put bloodlust on a global cool down for the group analogous to battle rez.
That's just ridiculous. its a buff that provides extra damage for 15 seconds. and its on a 2 min CD. how is that continuous / constant rolling bloodlust?