I agree with Matty. On the Classic map, one doesn't need to own a bonus region to win. I have won a few like that. What I would do is, build all my troops in one place, leaving a path open that'll allow access to the other opponents by those troops. Then, just wait for your big move (when you have the opportunity to kill an opponent, take his/her cards, and take out a second opponent, or more, with the troops received from the cards. In 'Increasing Cards' games, owning bonus regions isn't the key. In the end, it's all about the cards.
I agree with Matty. On the Classic map, one doesn't need to own a bonus region to win. I have won a few like that. What I would do is, build all my troops in one place, leaving a path open that'll allow access to the other opponents by those troops. Then, just wait for your big move (when you have the opportunity to kill an opponent, take his/her cards, and take out a second opponent, or more, with the troops received from the cards. In 'Increasing Cards' games, owning bonus regions isn't the key. In the end, it's all about the cards.