For Goliaths the optimal strategy I found was to tail them and wait until they ran into some trouble on the front end. Its easier to make it a pack kill. Wait for a moment of weakness and then finish it off.
In general the optimal strategy seems to be sniping. Stay on the edges of the map (N. Europe, mid Africa) and then sweep in to more highly trafficked areas and pump in missiles. If you are ever hit retreat immediately until you recover your health. That's a pretty low risk way to stay at the top of the leaderboard.
In general the optimal strategy seems to be sniping. Stay on the edges of the map (N. Europe, mid Africa) and then sweep in to more highly trafficked areas and pump in missiles. If you are ever hit retreat immediately until you recover your health. That's a pretty low risk way to stay at the top of the leaderboard.