Gargoyle ..... yes that could work all ready have the statues to make in to gargoyles the barb and the pekka. That could come alive and rage sprot wings fly up and defend if attacking army is more then 33% air troops. Can you imagine it a flying stone pekka that when she gets shot down she becomes a regular pekka but half strength. Only works it you buy the statues.
The barb statue would sprot wings fly at the speed of a healer and when shot down would turn in to a regular barb.
Also for bomb tower to release little air bombs/skeletons like the skeleton traps when air troops attack near bomb tower.
This would help counter the mass dragons and lava loon attacks.
