Ever played Retail especially right now? Sound like you would LOVE retail to me in the level 60-70 dungeons all they do is mass pull half the dungeon and AOE it down, I saw one tank mass pull pretty much all of the dungeons after the first boss (The rot poison one) everybody was dead but him and he then AOE it all down by himself and left since the dungeon was over.
In average they pull like a decent amount packs and AOE them down, literally retail is a mass AOE pull dream.