There are actually dialog triggers to improve Nordom's stats *3 times, in 3 separate areas.*
As to not bothering with the maze--hell, why not? It's a great area. Consider:
On the moderate and hard dungeon settings, you pick up good experience easily, while knowing what the threat will be as you enter each room.
You get plenty of good stuff, especially a variety of magical bolts, stat-enhancing items (specifically, lenses) for Nordom, wands that summon modrons to fight by your side, and stones that permit instantaneously travel anywhere on your home Plane.
Even if you don't want a lot of that stuff or overload, you can sell it at some excellent prices. The maze is a fine place to build up funds.
You get Nordom, the only character who has a longrange attack.
I repeat, what's not to like?