(Spoilers!!)
You can easily trade ALL terrostar techs from the iconians (playing on tough). Then buy 5 constructors and 10 turns later you win. Looks like a bad joke that you can win so fast on a immense(!!) map.
But if you forget to colonize one world outside the star system you loose when destroying it (and yourself). "The Dreadlords got planet Ku'vex"(or something) silly...