http://www.kongregate.com/forums/3-general-gaming/topics/34897-pandemic-2-better-100-day-strategy
Made by solprovider, a mod and a good friend of mine. I got the impossible badge on my second try using his strategy.
pretty fun, but for everyone complaining about balance: make sure you work on barriers first. lvl 1 barriers can take 6 of the early 2 damage ones, making them profitable. keep upgrading those and the last one, while being 29 oil, takes 90 damage.