If this is the same as the Nightblade passive used to be, then it is all 3 effects as you are really healing any of the Attributes (from a game mechanic standpoint)
However you can quickly test this your self if you have access to the PTS Server. They just did a character copy, but you can also load a Template with 3600 CPs (or you used to before the Copy) and then you can test this out real quick.