~~ How could one incorporate hand/land classes into a party?
5 player party size
Tank+DPSx2+Healer+DotH/DotL, instead of 4 man of Tank+DPSx2+Healer.

~~Sure, but what about mechanics?

Okay, one idea was the dungeon would be built around "escorting" the DotH/DotL around the dungeon while they "interact" with the nodes that appear that are appropriate to class Bot/Fish/Min and so on. When interacting with a node or after a node is completed enemy's spawn and the combat classed then must kill them. If you have ever done a fate <and I know everyone has> that requires you to gather items and deliver them to an NPC then you know about the "progress bar". The dungeon could work in roughly the same way, as you gather items < HQ items adding more to the progress and Harder to obtain items adding more to the progress still > until you complete that area's requirements.