Make a huge map thats imbalanced to you: ie less planets & less resources for you two. One access in & out of your system.
Load it up up 7 AI (lock them to same team) vs you two. If that still seems simple make all AI players Advent & Tec.
Superb shield strength & repairs. have fun with that .
That'd be very interesting at least. Any takers?
A friend and I did this, although since it was only 2 of us we are currently playing 4 AI's instead (all on one team)
Made them randoms but it turned out 2 advent 1 tec 1 vasari.
The map was custom made in a shorter period of time, we each have 1 ice 1 volc 1 random-ice/volc. Choke points are a desert planet (each), both connected to eachother and leading to the only entrance to the galaxy, the star. But we are not getting attacked..
Testing seems to show that the AI just don't like a guarded planet as the first connection from the star/wormhole. In previous games we were playing against only 3 AI, yet had out star system raided constantly even early game.
In that game our bases were connected at a single choke point (which was uncolonizable) next to the wormhole , and after the choke point it split off into 2 pathways, so our defenses were never really within a star system of each other.
This is a shame because in this 2v4 game I scouted them, only to find they were just sitting on the first planet in their star system. My scout lasted literally a second, their combined fleet was
MASSIVE. Without going into detail if they attacked at the same time even though our defenses were basicly back-to-back, we would've been smothered. (but what a damn fight........which is what we wanted!)
Hopefully some modders take up the challenge to make either a more challenging AI, or atleast put in higher difficulties/resource+buildtime scaler. Anything for the short term.
Although i love stardock as a company, in this industry AI seems to RARELY be a priority, most likely because it takes the most work and has the least visibility.
edit:playing against agressive AI (hard), which seems to be the most challenging.