I definitely hear your frustration. Level 43 can be a tough spot because it feels like you’re putting in a lot of effort for very small returns. One thing that’s important to keep in mind is that while a “lightning” box guarantees a prize, the actual value depends heavily on the box’s specific effect - like whether it’s bubbling, flaming, or steaming.
I’ve put together a couple of guides that break down these prize tiers and offer some general tips on city building so you can start seeing those bigger payouts without having to rely on gems. I hope these help clear things up and make the game a bit more enjoyable for you!