Quoting Turchany, reply 3Propably the best you can do is trying to accomplish it with a human ally (although I'm not sure it counts). Missions are ruined in this version of rebellion, and they are worth nothing compared to original sinns, as their effect on relationships are SOOOOOOO SMALL.. Only worth doing them for the money.
I still think the current system is far better as before your ally often would ask impossible things from you.... and then declare war if you failed them.
Maybe better, but now may God save your soul if you start with random factions (and the times back, when I played against AI I liked to do that, but Rebellion f*cked this up, and not that fun playing with pre-chosen factions and FFA with teams forming in-game, as you already know what faction will be your ally as many factions hate you so much..) and there won't be a good faction to form alliance with, like every other spawned AI player will hate you even if you research everything and give him max resources... And not even near is the cease fire :/ easiest to form an alliance if the ai is the same faction as you, as it is very random how other factions feel about your faction, and it is impossible to send enyoys to a still enemy player as it focuses on killing them sooner than later.