When a planet is colonized near you by an AI, buy it from them. But you cant wait too long before they say its become important.
Good one. (Makes not for future use)
Stop colonizing before the AI stops colonizing.
Good one, I've done this, not really on purpose. It works well on some boards.
Any ideas or tips?
I try to colonize, towards the AI, to limit the AI's reach away from it's point of origin, and I backfill later. I just concentrate on the civ's closest to mine. On galaxies with tight clusters, I "planet hop," that is when I find a system with two habitable planets I take the larger one and ignore the smaller one until later, even the PQ4 near me. It makes good bait, all the AI's that scout it waste sending a colony ship to it, and I take it at the last possible turn. With the "planet hop" I get a mix of other civ colonies within my sphere of influence. Later I research the cultural domination tech and set up SB's to get them to flip over to my side. It's like getting free colonies. It can be economical to get ready made planet's at the AI's expense.
I play DA on normal. For my play style I wouldn't pick off the AI's colony ships. I like to be good and see how long the different AI's last against each other. You know max trade, everybody is my friend and my ally, giving me research and economic treaties, just a big happy galactic family, slowly falling under my influence. But as an evil civ, why not pick off all those juicy good civ colony ships! I mean everyone has to eat right? They're just targets! But first, extort them for 2000 bc and some tech's!