Talk:Healer/@comment-44644888-20191211170229/@comment-25856498-20191211171444

It means, if you had $$n-1$$ healers already healing a target, how effective the $$n$$th healer would be.

For example, if I had no healers on my Giant, adding one Healer would heal him at the full rate. Adding the 2nd healer would also heal him at the full rate. But a 3rd healer on the Giant would only be 90% as effective as the first two, and so on.