[CUnknown]

I don't think we need Productivity to be competitive with Order. It is okay, imo, for some scales to be better than the others, it's just that the disparity in this case is a little extreme. Especially in the late game. As in, Productivity is a worthless waste of points once you reach endgame, and Order to recruit and maintain mages is very valuable.

So, a nice little benefit like decreased castle construction time and/or cost would go a long way to removing the problem here, I think.