With the decreased rate of Possessed Bosses in Phoenix and Mount Killjoy, and thus less mboxes(pills) for those areas...
Do you just head back to the last area of Metreon for the greater PB rate? Or do you stay in the highest area anyways because of the higher coin drop=more misting=more chance for mboxes?
I'm trying out Phoenix right now. Spent over 150e with no PB. I'm seriously considering going back to Metreon. The coins from the higher PBs, as well as the exp, will make it both better for xp and coins and mboxes I think. I'm only level 86, so in a few levels that may very well change. But for right now...I'm thinking Metreon is still more profitable.