Funny you should mention that, DrG - I grouped with some varying levels today instead of the usual 31s, cae to similar conclusion that that might be it and was coming here to report that. I do hit sorcerers with mana and fill it when they are several levels lower at least, I didnt do anything scientific but was assisting a level 16 and it worked. Maybe as we gain levels and mana pool increases, somewhere along the way it stops scaling?. If that is really what's happening, though, I should at least see it nudge up a pixel though shouldn't I? And it does seem to work sometimes but not others.