This might requires BOAS, and a lot of survival(HP pots). In Burning Steppes there are packs of 25-30 orc/trolls/ogres. I managed to kill packs of them on my Hunter with Multi-Shot and Cheetah Aspect.
Attachment 6043
I am ASSUMING a geared Paladin with BOAS and a prot spec can Trash these with the help of HP pots. I bet a Fire mage could do the same thing i was doing with kiting. I got 7-9 Lovely Charms per pack. I would assume a prot pally can take on all 25 and drop them in 15-25 seconds.
NOTE: You may need to do quests to get this area opened. I am not 100% sure. I found it while questing.
GL. Someone please try this on a paladin around level 50. I would love to see a screenie of mass amounts of EXP/Charms flowing through the screen.