I would be fine with individual wins, as one team running a strong technical game would only have that as their yardstick. However, a team with more roleplay would be happy with just a good, entertaining game with some drama, and be happy with a moderate survival and a good narrative. Another team may be embroiled in legalistic conflicts and wordbending in a cloak and dagger style forum conflict, and be happy with that, at the expense of gameplay. It is all up to the team what they want, and I do not think we need to consider a victory condition as such the main part. However, we can disable all victory conditions but a histograph win, so a team does not end their game prematurely, and all civs run their course. Then each civs total achievements will be considered, and the forums will tell which team had the best social experience.