There was some concern [from the other thread] that a player could never get enough RAs going to make a difference. A fair benchmark for rush buying after NC is 3 universities and 3 public schools, hard building in the cap only. That would be enough gold for 12 RAs during the course of game, but if RAs out perform rush buying at 4:3, one would only need 9 RAs to test this. With 7 civs on a standard map, 9 RAs seems pretty feasible over the course of a game. Optimal would be a mixed approach: aggressive RAs with rush buying in lowest production cities, and rush buying in other cities only to the extent that RAs are not passed over for lack of gold.