Balance Changes/ Dragon Nerf
It seems like there is only one single strategy used right now for top level players. Which is spamming 10-11 dragons with 3 lightning spells. This creates very stale gameplay lacking creativity in attacks. Balance changes need to be made, either the lvl 3 dragon needs to be nerfed or a new defensive structure is needed to counter this strategy.
My suggestion:
The dragon slayer:
A structure or roaming unit which gains attack damage after each dragon it kills.
Example stats:
3000 health
100 dps + 100 dps for each consecutive dragon killed.
Range: 10 tiles
Targets: Air
Favorite Target: Dragon