Here is a place i go to farm silk its a great place you pull huge amounts of mobs. When i say huge i mean you pull the whole instance in one go. no messing around im going to be recording this on my paladin tank. but you can do this pull in cloth i have done it many times on my priest in holy spec.
The instance is called Scarlet cathedral



so here is what you do
1) enter the dungeon
2) run to the last boss and aggro him and kill him
3) when the Princess runs out attack her until she sends you to sleep
4) now both the princess and the last boss should be alive run back to the start of the instance with them following you
they will aggro every single mob on the way and you just aoe them down and quickly cash. This is also amazing for boosting a lower level friend or alt. If you boosting a alt with triple EXP then you should gain a level everytime you do this pull.