When I first registered on CC, I read through the SoC topics on strategy, and their most repeated strategy (mainly because it's successful in so many attempts) is to stack 3 or more territories in various regions of the world in order to be able to act on an opportunity anywhere, increasing the likelyhood of easy spoils and therefore contributing to the overall goal of the Escalating Final Sweep that destroys everybody. I was thinking about how to best counter it, since it is used by many due to its ability to win many situations, and I came up with a possible idea: "Containment", taking its name from the American policy during the Cold War.
Since their strategy seems (at least, to me) to imply that attempting to connect all the territories you own is useless and not to be pursued, then the stacks are obviously isolated. So, why not simply surround all the stacks with unprofitable amounts of troops? Of course, this is best used when you have a coalition of players each partially surrounding a stack, since you alone can't do the entire operation without giving up a lot in the process. The goal of the SoC strategy was to get easy spoils and conserve troops at the same time- so deprive the player of that opportunity. Since they don't have any other bonuses (SoC is, of course, against any Bonus Monkeying) and most likely won't have enough territory to get above the regular 3 troops per turn, they could be eventually wiped out through combined effort. Which one in the coalition profits most from this and how to make that person you, however, I don't know.