So the water main healing mystery cleary states "recovers 25% of life of field units based on ninjutsu, and removes all debuffs"!
However, in practise this is not the case. If the team has multiple debuffs it removes debuffs only and provides no futher healing. Only when the team isn't inundated with debuffs will the WM actually heal the characters.
So It's been like this for a long time, guess the question is.. why is no one talking about this? and why hasn't it been fixed?
Seems pretty silly...