- Air unit (Balloons) on TH3
- Dedicated Air Defense Building TH4
- Another Air unit (Healer) on TH6
Except on few occasions (like Clan war) most players don't use Balloons (specially cos of their training time). So, Air Defense Building is basically useless on TH4 & TH5.
So, it would be great if Supercell introduce another flying unit.. "Baby Dragons" (God, watching higher TH players using drags in war are awesome....).
As for the unit's specifics..... i am not sure.... but 1/4 of a dragon (HP/Damage/Cost/H.Space) etc.. except for speed.