Found a good spot to farm Lovely Charms in the scenario "Crypt of Forgotten Kings"
You will be farming Spawn of Anger which do little damage and respawn instantly.
You will have to kill a few mobs to open the two sets of doors to get to the last room.
In the last room there are three Shadows of Anger that spawn the Spawns of Anger.
DO NOT kill the Shadows of Anger, just kill the spawns.
As a bear druid I stand between two spawn points so that I aggro mobs as they spawn and just spam swipe and thrash.
This method yields about 20 charms per minute.
Screenshot:
http://img38.imageshack.us/img38/968...ycharmfarm.jpg