Hi, me again. I've been playing a for a while more, and I think I have an idea that might help those who think they don't have enough cards to finish the game. If there was a "thermometer" on the side that signifies the attack points to enemy points ratio, it could give players a sense of how well they're doing before they get to the end of the deck. You'd have to play around with it to see what feels right. I guess it might need to be adjusted by difficulty as well, since at that level attack cards don't mean all that much.
Just an idea, best of luck!