Ten Ton Hammer has a full map of the Vanguard section, Trickster's Haven. The map reveals the salient points in the dungeon and the creator of the map explains:

For quite some time before my main character hit 40, I would always see, "Class X looking for Trickster's!" scroll across the Qalia regional chat channel as I off adventuring. I always wondered what it was, where it was, and above all, what secrets did it hold? Since I'm finally there, let's find out together.

Check out the map at TTH.