When I have been 5 boxing on my Locks I don't have anything spellwise that can tag the mobs fast enough before someone else.

I am all for waiting my turn, but when it's a named mob for a quest & I have been waiting 20+ mins because people kept taking it (even though I told them I was waiting) I got fed up.

So I stuck one of the Voidwalkers to agressive and stood on the spawn point.. worked like a charm