@Kahuna:
FWIW the AI already does the "if only 1 ingress point, save up for larger waves" thing. And somewhat larger for 2 ingress points, iirc, and somewhat smaller waves past a certain number of them. That has a reduced effect during the first 2 hours of the game (because the starting homeworld is, obviously, just the one ingress point) but after that I think it can be as much as a 50% increase in how long it spends charging the wave.
We could try having it go up to, say, +200% vs a single ingress point, if desired. Might be a long time between waves.
(ninja'd)