Make sure that the friend who has not yet won a game understands that each additional missile for the winner is really bad. Make an alliance and make sure that one of you wins. Of course, you want to be the one, but if you don't win, make at least sure that the missiles are distributed evenly.
Diplomacy in a three player game is probably more difficult than in a four or five player game, because any alliance automatically leaves one victim to be wiped out who will not have much time to convince someone else to break the alliance.
Diplomacy in a three player game is probably more difficult than in a four or five player game, because any alliance automatically leaves one victim to be wiped out who will not have much time to convince someone else to break the alliance.