Remember the Athenians. They valued knowledge over many things. Use control tactics to learn more about your enemy like looking at their hands or even just bouncing creatures back into their library, then play just the right cards to manipulate them. Also if you side board cards that tap your opponent's creatures then it should help you as well (because when you swing with an unblockable creature or something with first/double strike then their creatures are still untapped and ready to counter you next turn. You've got the offense down just don't
forget the defense.