allied Victory .. is it possible ?

[Heironeous]

I think playing as a team (or "Pantheon") against another pantheon would be my ideal game (in theory).

I agree. I used to play a PBEM wargame that ran both individual and team games, and the team games were far more interesting. Focus switches from cutthroat diplomacy to detailed cooperation. Interesting to note that some of the best individual players weren't good in a team, as they just couldn't divorce themselves from the selfish dynamic of the individual game.