Dont forget dungeons!
As Xalmat states a Conjy is pretty good soloer as I'm finding out now (just got my 1st to lvl32) - Mid-High 20's can hit up the 1st few namers in both Fallen Gate & Stormhold.
Lvl28 upwards can smack up Ruins of Varsoon, just run the circle of 1st four Named guys on the map, can invis all the way from each to each or kill the little heroics for XP. Keep your AA slider quite high (mines at 60%) which is keeping me nicely at the 1.5x level.
You can net yourself a few spell upgrades in these places and a LOT of rare harvests & treasured items which sell quickly to transmuters which can then be converted into Experts/Masters/Mastercraft gear for yourself. Have spread my AAs between personal DPS (casting speed & the end of that line helps a LOT with resists) + tank survivability at the mo...
Stormhold is on the east side of Antonica. Fallen Gate is northwest Commonlands. Ruins of Varsoon is a dungeon on the southern side of Thundering Steppes.
NM