[2020] Ancient chest hunters question

So in the last 2 days I’ve found 3 ancient chest, one in sperios city, and 2 in eidolan forest. I’ve had GREAT luck to say the least. I pulled a wandering wizards staff card and requiem axe card back to back, then a sh*tty recipe the third. I’ve marked my known locations on my map. So my question is, I wanna spend some time farming these but I’m not quite sure how. Do I stand in a known spot switching channels and wait, or do I roam the corners of the map on both channels? Any tips would be greatly appreciated, in dire need of star seeds and hope this method will help a bit.