I couldn't help but think that this game is crying out for a game mode/ victory condition along the same lines as the sabotage game mode from MW2. Now, before I die/ am murdered for mentioning a FPS, and MW2 to boot, with respect to a game like Elemental, give me a chance here.
It would work something like this. There would be an item in approx the middle of the map, in somewhat neutral territory, eg a sword/ring etc. It could be hidden as part of a quest/goodie hut location, or carried by a somewhat powerful npc. This would be the bomb ala MW2.
The objective would be to escort the item to a location deep within an opponents territory and hold it at that location for a pre-determined length of time.
Now, diplomacy and number of players raises a problem. If teams were locked it would be simple enough. An example: Kingdom/ Race A, brings item deep within Empire/Race B territiory, holds it there and all of the Empire/Race B teams lose.
Alternatively each faction has a guarded location and one item spawns, collected, brought, held and that faction is out. New item spawns until one faction left. This would make diplomacy crazily important to avoid a 3v1 or 4v1 scenario. And also after a 4v1 scenario, who out of the 4 left becomes the new 1 for a 3v1 and so on.
Some additional points, the item spawned would be a super item with side effects, eg. Equip for +30 attack, equiped character dies in 75 turns. This would be heavily tied to adventure research in some way. I would be grateful for some opinions on this, and raise problems/questions so I can explain it better because I'm sure I've forgotten to mention something.
Disclaimer: I am very well aware of the feature lockdown and the problems of suggestions that have no understanding of feasibility and code writing. This post falls into the category of someone who has no clue about feasibility, so feel free to ignore devs.