Woohoo, second game down.
I don't think signing an agreement in the beginning was a bad move at all. It allowed both of us to get a continent early, since we were really each other's sole contenders in Oceania and South America.
Regarding my mission and its simplicity, well, I don't quite agree. You can be lucky and manage to destroy someone, but since everyone is eager to get those bonus cards, you have to be just that - lucky. I was one turn away from being the one to kill Red player, I tried to bully Yellow into leaving him be. When Yellow didn't, my road became a lot longer. It was also fully possible that someone strong would kill Yellow too, which would have made my mission more or less futile.
If my mission had been to have a foothold at every continent, I would have had that some time ago. Because of my armies already present in Asia, a sneak attack Argentina=>New Zeeland, Venezuela=>Central America and Brazil=>North Africa=>Western Europe would have done the trick way back when.
I guess what I'm saying is, every mission can be a lot easier by sheer luck. Anyway, nice game all, much more fun and challenging than the last one where people seemed to act like headless chicken most of the time, at least in the end.