The infestation card as worded seems a bit too easy to accomplish. You could easily suicide attack with common units on the skylines, and the four points is a lot and could easily be an instant win once you get to the mid-game. Sure you risk losing the units, but four points is very significant. Does anyone think that this card would make more sense if it said "control a location in each territory"?
The intention of the card is that you control a location in each territory. We will Errata this when we release the first FAQ. Sorry for the confusion.