Lot of misinformation here.
- The defending team always gets +20% attack and +20% defense, because you’re at a massive advantage as a human playing a basic AI
- Based on tens of thousands of user-contributed datapoints, there is no indication the AI is specifically targeting high value cards. You can both observe how it plays for yourself when you autofarm, and read this great thread on the topic: The AI is Becoming Smarter Again And Again
- The defender’s turn counter is balanced against the attacking human players’s varying ability to make combos and cause tile damage during their turn; it’s the same thing. If you get a combo, you can attack “3 or 4 at a time” as well
- While the parameters of any good competition should be fair, the outcome rarely is – or we would have no motivation to compete