I agree dream, I dont play this card for the same exact reason why I dont play reflective shield and that warpath remove from teh game location card. They are unplayable cards because they rely on you being bad at the game. You have to purposefully let yourself get slapped in the face for you to get any benefit, in other words, why not just play something else where you can let your skill shine through instead of playing a passive card that hurts you before you get anything in return.
At the moment, luftkrieg is prohibitively too costly to play. Lazer Ion cannon is strictly better at that point since it does more dmg, more aoe, hits all types, and can be used as a skill shot instead of a passive let yourself get hit first. All for the same cost. If luft cost 4, maybe , just maybe it might be playable in the loosest terms of the word.
I'd rather have the card do massive damage to the first flyer hit to basically guarantee one dead flyer per round, allowing for thoughtful decision making into flyer order/ability for skillshots to matter in this regard.
As it stands now, it makes to no sense to play it. Maybe changing it so it damages flyers first could make it slightly more playable, but ion cannon still outclasses it anyway.