Ok, i'm probably stopping for today, the list of "achievements so far":
I've beaten everything to the east except magma mines (they don't seem to have a money reward quest). I don't want to unlock the Mage Plate and the Battlemage ring, and I haven't unlocked Bloodmage, so I didn't do his questchain either. I unlocked the dragonkin.
To the north, I've just done northern desert (and it spawned the wraith boss, but the tooltips say tower of goo). I haven't unlocked Mysteria.
To the west, I've done eastern Tundra, and unlocked GG.
To the south, I've done everything besides slime pits and Naga city, including the two purist monk quests (southern swamp, and Ick Swamp).
I've died twice so far (on accident), and I had had to retier without winning once or twice. I have 3477 gold.
It can be done even smoother than this, i'm sure.