The camping for the Guardians of Dissent and the Smoldering Shadows is a pain for all professions who like to have their new weapons/nanos. It needs hours between two spawns and then the Mob doesnt drop the questitem.
Please keep the fun up the new quests brought into Inferno and repair/increase the spawntime of those mobs. Look into the spawntimer of the Ember Chimera as well, it seems to be borked as well.
Pax
Shii