Wow, are we taking over this thread or what?
Too bad you couldn't get cover promotion because that would make it even so much sicker. I think we both agree that getting cav early means the main unit you will be against is the bowman (by numbers). So cover would be even more deadly here. But two strength promotions are already good enough. And the nice thing about strength, is it is an all-around purpose promotion. But there is a lot of macemen by this time too, so again shock promo makes you come across with even less damage against these units in both the field and cities. That means less healing time, and more battling.
Back to the shock, one thing that has surprised me is in the late game, when you keep promoting your mechanised infantry. Eventually you'll get the added +10% meele bonus. I think that comes after a few strength upgrades, or so.
Can someone elaborate, as to how one can make any use of a meele bonus when we are fighting modern wars?