[Karinya]

I had this problem and discussed it with my LS, and they suggested that someone might be inside the walls mining the points from there (and that's why you can't see or target them).

If the STF is halfway competent, they know this stuff already, though. All they have to do is trace back a gil-supplier, look up their AH history and see it full of khroma ore, and they know *something* squirrely is going on in mining; lurk around Zhayolm in perma-invisible mode and they can observe the same things we do (if not more).