Gedonia 2, early access: episode 10, Coast Guard Island

A dungeon that's outside instead of in a cave or building. A boss that you can't attack, but can damage you. Steep ledges and ramps. Gaps in walkways. Traps on the ground. Agility builds are perfectly suited for this area.

If you don't have 4 agility, I think this dungeon would otherwise be most effectively handled in co-op by having one player lead the captain away, one player carry the crystal, and at least one player eliminates enemies. If none of the players in the team are an agility build this would be difficult but still possible. I think it'd make for an interesting challenge. I pity whoever has the job of distracting the captain while having low agility.

The dungeons in Gedonia 2, especially the second area, are designed well. They're not too large. They're spacious and have plenty of terrain to make agility very useful. There are puzzles. There are secrets. Even after figuring out how to complete a dungeon or area, I want to try it again with a completely different character so that I can experience a different perspective.