[Kuritza]

Air + Nature = rainbow armor, one of the best armors in Dominions.
Man was seriously nerfed when Lamia Queens got 'death' in their casting requirements. In Dom2, having nature magic meant that you can easily expand into death, blood and astral via lamia queens.
So, perhaps giving Man some wannabe-lamia queen with just nature or nature-air/water/earth casting requirement would be a way to aid the nation.