I've said it before and I'll say it again. Scorched earth policy: raze every city, destroy every improvement. Reduce our empire to manageable proportions in America/Ottoman. As long as we've got aluminium and oil we can produce modern units. Abandon our recent conquests in Spain, wait for them to be recaptured and then retake and raze. Annihilate the Indian presence in Old Carthage. To combat WW (our biggest problem) build jails in the cities we're keeping, build Rushmore and switch to police state; we can't cash-rush but we can still use cash to update existing units and we can build replacements faster.