Well I ended up farming Atziri for a while tonight. Think I did six runs, which cost me about 12c, and I've got around 100c worth of loot to sell plus a decent haul of maps to run at a later date.
I actually ended up doing this fairly randomly since I had no idea what the map fragments that opened the portal to Atziri even did before I threw them in the map device. Figured I would just try it out and ended up having 50c worth of loot drop on my first run. Beginner's luck I guess.
I'm probably not quite tanky enough to make the runs super easy. If I screwed up on the last boss I absolutely was getting killed in one shot but my dps seemed to clear the phases quickly as long as I could keep my totems up.
Overall it was pretty fun and ended up being pretty profitable as well.