i went to visit jadefang today, but unfortunately she wasn't up. after zoning out of a queued instance back to her location, instead of finding a rare mob or no mob, a sturdy treasure chest spawned right in jadefang's spot. within it i found a blue item level 292 item. how very bizarre!
i haven't read of any other spawn point for jadefang yet, so i can only deduce that jadefang and a treasure chest are on possibly alternating spawn timers?
i'm going to continue checking back, but i don't foresee myself getting a hold of jadefang or the tiny shale spider any time soon. lol.