Here's the thing, in 5.4 all the former quest bosses in Vale of Eternal Blossoms were turned into rare mobs with about 50% chance of dropping the new Treasures of the Vale - Item - World of Warcraft loot bag which contains mostly profession drops. The rare are on a decent respawn timer, not sure if you'd be able to kill all of them nonstop. However, there's one NPC accompanied by adds, General Temuja General Temuja - NPC - World of Warcraft. What i've found is that if you kill him and leave the adds alive, resetting the adds will respawn the General. Should be fairly easy to farm various mats. In addition, this is a pretty good way of farming Golden Lotuse reputation. With guild perk you get 220 Golden Lotus rep per kill, double that after you get to Revered and buy the commendation. Enjoy!