I searched and was surprised to not find anyone mention the new play by E-mail game Solium Infernum. Like Dominions or MoM you design your leader (an Archfiend competing for rulership of a very hexogonal Hell), but SI takes it a step further as you also choose a "Public Objective", which gives you bonus victory points for completing a condition by the end of the game.
Some of the interesting conditions are:
Sloth: Make no Demand or Insult the entire game (Solium Infernum is very diplomacy based, you have to have cassus belli to attack another Archfiend's land)
Envy: Steal at least 10 resources from other players and bribe at least one of their heroes or armies to your side.
Wrath: Destroy at least one other player through capturing his capital.
Pride: Complete the game never having sent or recieved an Emissary (which means if anyone sends you one you must refuse the gifts he brings).
Gluttony: Consume at least 35 souls (one of the games main resources).
Greed: Hold at least 50 resources in reserve at the end of the game.
One cool part of these is that you can at a glance gauge a player's (Or computer AI) strategy based off their Objective. A Wrath player might be nice to you, but you know that at some point they are going to want to crush someone. An Envy player is going to be sending thieves and bribes your way, so you either need to get off his target list or beat him at his own game. A Pride player is going to refuse all your emissaries, a good excuse to attack him! And a Gluttonous or Greedy player near the end of the game will have a lot of resources to use, or be stolen
Some of these concepts do not work with Elemental's gameplay, as Solium Infernum is based around a power struggle that ends relatively quickly after a semi-random number of turns. Elemental from what I've played/read seems more traditional 4X style, with Conquest, Research, or Magical Mcguffin as your typical win conditions.
Another cool aspect of Solium Infernum is that Archfiends have a Rank, from Prince of Hell descending to Duke, Marquis, Baron and Lord. These ranks cost a lot of points to start with, but give you greater starting armies and resources, as well as making your diplomatic overtures more forceful.
Finally, there are a couple special perks that Solium Infernum has available that I have not seen in computer gaming. Kingmaker allows you at the beginning of the game to choose another player, and if that player ends up with the most victory points at the end of the game you win instead. Other players do not by default know who is or isn't a Kingmaker, but once players figure it out, it puts everyone in an interesting position as the target has to annihilate you before he can win. Power Behind the Throne is the other perk, it allows you to switch places with the winning player if you get second place and convince him to make you his vassal before the end of the game.
Both of these perks seem extremely powerful, but cost enough points that they make the archfiend who chooses them take a big risk, because if you choose the wrong player to "King-Make" you can go down a rough path, or if you overtly help him too much early on, leading him and his allies to destroy you.
It seems to me that Elemental Channelers could use some of these "goal-oriented" traits, as these allow you to implement sweeping changes without upsetting a games opening balance.