Here are some zones that I have done lately for various combinations of fun, XP and cash:
RSS is currently very good AAXP if you can kill non-stop, but you'd probably need to at least duo there for it to be efficient. I don't have enough defensive AAs for soloing to be viable, but your mileage may vary. Mostly unexciting cash drops.
Infected Paw has a couple of areas where you can single pull easily (if you know what you are doing) and tank them with Cougar/DOTs, although Water elementals (Clerics) can be annoying. Lots of gems to sell and a fair amount of research stuff plus a couple of twink items off the named mobs (not the 4 mini-bosses for the Type 8 augment), worth up to a few K. Mostly light blues with occasional greens. Fairly mediocre AAXP, but a fun zone in my experience.
Sunderock is currently a hot zone, so you get an additional 260ish pp per session and the mobs are easily tankable light blues with some greens. Some named mobs are doable, but certain ones will swallow you whole in 3 seconds flat (Komodokin!
) Nothing special in terms of either XP or loot -- unless you need the new augment -- but it's peaceful and relaxing.
Tower of Solusek Ro has fun mobs which mostly come in twos. They are not rootable or snarable, but they are fully slowable and you should be able to tank two at a time easily. The loot consists of PoP era parchments and not much else aside from the ubiquitous Elaborate armor. Probably other PoP zones as well (level 69 Elite mobs in Tactics, perhaps?), but I haven't tried them at 80, so I don't know how efficient/doable it would be.
Daily quests in Dragonscale and Loping Plains if you need faction and/or Fenden's stuff. Even without fighting, you can get 50 Faycite and over 1 AAXP every 17ish hours, which is decent. Mass murder Minotaurs for the Brownie faction and OK XP.
TBS if you don't have the skeletal hand augment. I am about to start working on it again after a long break, so I don't know how good the XP would be at 80. However, most of the quest is supposed to be soloable and some camps are reportedly good XP.