I don't see where anyone has posted this before, but I think these relics are way OP. 512% to all of your planets?  I can see a boost to the nearest colony, or a set amount divided by the number of planets colonized, maybe with an extra portion going to the homeworld (taxes). Once you get to Xeno Archaeology it is impossible to lose. The AI isn't aggressive and I've never seen them build any starbases yet. Of course, I haven't played on the higher difficulties yet, but even still, they should put up some kind of fight. Instead, I just buy all their techs, and their survey ships, and they are happy as clams.