Did you ever add damage bonuses related to height or height differential? I think that is one of the reasons I never really came back to this game.
There's a pretty OP strat where you use Trading Post and some cards that give bonuses related to cards destroyed (since Trading Post functions by destroying itself and then making a new copy). There's a card that gives you height and then I used a card that would be a big finished, but I forget if the finisher was height based or destroyed card based. You can get kilometers in a single match like this.