Clash of Clans idea

I think it would be great and very helpful in the next update if you guys could make it so you can direct your healers to heal a certain troop like giants for example. I noticed in one attacked that I sent in barbarians to defeat the clan castle troops of my enemy and one survived. I then sent in wall breakers giants and healers. But one barbarian survived and was being attacked by a cannon, so my 3 healers decided to heal one barbarian rather than my 16 other giants. So it would be great if healers had a target mode. Thanks :D