It doesn't need to be improved
Your idea to the forums is appreciated, but is not needed.
I can say I hate it when they heal a single archer instead of my giants, but it usually because of the way I place my troops.
I agree and have felt the same way
Not asking for much...simply if I deploy 10 giants and 1 splits off...it would be nice if the healer at least stayed with the grp of 9..or the greater grp...now if that 1 is off and gets hurt and is in range that's fine...but just a little more smarts here would be nice