I'm a maxed th8 and I have noticed that no one uses healers anymore. The air defences make it so that healers are very ineffective. So now my friend and I have come up with a way to make healers effective again.
Basically, when the healer is upgraded to level 3, the player can go to the barrack, press healer info, and choose to toggle it to a ground troop(you can not toggle them during raids). The new healers would then have reduced healing but they would be less vulnerable.
And to make air healers still useful, when healers are in air mode will give every troop in her blast radius a 1 second shield, blocking them from some damage. Additionally, the healer will heal herself a portion of the health she helped recover. Here are the new stats:
Edit: Every 5th shot is a shield blast that lasts for 3 seconds.
Healer lvl3: (ground)
Heal: 30
Health: 680
(Air)
Heal:58
Health:720
Shield: 10%
Self recovery:15%
Healer lvl4: (ground)
Heal: 50
Health:780
(Air)
Heal:62
Health:820
Shield:15%
Self recovery:20%
Thanks for reading, feedback is much appreciated.
(Note: ground healers cannot target air troops.)

