Ok, So I've played a few escalating games, and when they come down to 3 player (or perhaps begin so), there seems to be a common theme.
Occasionally, everybody is equally matched, but most of the time, they're not. Usually there is a cripple. He's made his mind to go into a corner and if he dies, so be it, if not, he'll just keep adding up armies in hopes the other 2 will kill each other.
Another guy always there is generally the "alpha dog" This person started off strong perhaps, or maybe just killed somebody. He/she holds generally several continents and is reaping big bonuses. They are either too far away or not yet powerful enough to take out the cripple, but are a growing threat.
Then there is the middle guy. This is where my question comes in. What do you do if you are the middle guy. You can almost take out the cripple, but not yet, and if even if you could it won't be worth it... yet. If you pick on the big guy, you'll both weaken and you'll get the worst of it. If you do nothing, the top power will soon triumph as they are getting the bigger bonus and have already more armies.. So.. what would you do?