In your comments post, you mentioned the difficulty of locating enemy forces; why not use spies? I understand that, for the most part, slider moves towards additional spies are suboptimal, but perhaps it might benefit you in the short run.
Then again, you've conquered the world infinitely more times than I have, so I'll leave it to your judgment
Then again, you've conquered the world infinitely more times than I have, so I'll leave it to your judgment