Once you get into the later game you're going to have an obvious shortage of Governors/Generals to administer each city/army by themselves. It might be best to use good Generals as they come and then use a couple Governers to cycle through your most important cities, queuing up armies and buildings and letting those be built as the Governer continues cycling between cities. At the moment I'm probably going to be doing this as I'm stretching thin - 2 Govs for 5 cities and the rest for my expansions. The only problem I see with this strategy is a huge loss in money from not having the Management on hand for the high production that good Govs give.
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