I was not going to make my own post to this because that would be a repost but I replied and saw it just got lost in the shuffle of posts on here. I apologize if this has been mentioned before in previous posts but here is what I found.
In this post http://www.mmowned.com/forums/wow-gu...-icecrown.html they mention this spot in Ice Crown.
Since the mobs have so little health, if you single target kill them you can 1-shot most of them. If you are a stealth class or perhaps a nightelf like myself you keep the Master Summoner Zarod mob alive. (If you click the link you can see where this spot is).
If you keep this mob alive (ie. Kill everything else then shadowmeld / stealth), he will walk around the area and respawn all of the mobs you just killed. This will greatly increase the effectiveness of this area! I do this place before work when I dont have a ton of time and always get a good chunk of gold.
Hope this helps!