after a few games where i noticed the same thinks i started playing another bigger one, actually i m playing a game, rdm single star for 8 player, all AI as cruel, and have found some thinks quite boring :
- basically if you survive the first hour you are safe, every AI start asking you for trade or NAP (no agression pact) and you have enough ships/planets/starbases to be an empire who it's need to be dealed with... so without doing anything special i have 5 AI with trade/NAP working and 2 whitch i'm fighting against but one is on the other side of the universe and not a threat until 2 or 3 more hours of play, and all of this mostly because i refused their ally request... so if i wasnt an agressive guy i could have 7 NAP working ... not really funny
- but i m still plying to familiarise with new stuff, so i m trying to build some pacts... actually i can't make one, i can't reach minimal diplomacy requirements, diplomatic envoy and tech seems to change nothing, € donation give a little boost but no more and i actually have 3 ships working on the same AI and nothing is moving much 
i'm waiting for a mission to complete but nothing is coming... i tried to mission some other ally with easy thinks like kill 1 ship for 10 000 € they don't accept, mission is pending since 1 hours and nothing happen.
hum my mistake, the only AI who's ask me for some missions is the one i'm killing ... disturbing ^___^
so here i am; playing in a peaceful galaxy, growing culture and preparing some backstab for my neighbours and still trying to make som pacts...