[ano]

Yep, "open-ended" games are a pain. If you want to win, of course... That's why I nearly never play more than one at once. A lot of time is needed to plan everything accurately and even more time in a team game. Most probably, I'll never have MP experience with most of Dom nations but it doesn't matter much.
OTOH, other victory conditions (such as VP's), in my opinion, make game less interesting.