Formal Alliance Victory Conditions

So my friends and I have been discussing how when you work together with someone you should both be able to win. Right now we’ve all agreed that none of us could have won on our own because we shared tech and helped attack stronger opponents but it was a team effort. I think that there should be a scaling victory condition. IE: 1 player needs 50%, 2 players need 66%, 3 players need 75%… etc. those numbers a just a suggestion but let me know what you guys think. Additionally everyone in the alliance would have to be allies for the conditions to come into effect. I think this should be an option that all the parties must also opt into when accepting the formal alliance.

Thanks guys,