Cheers rdonj.
I don't really know how unbalancing the recruitables will be. Hopefully not too much. They are going to be very expensive and it won't really matter if none are recruited as some will appear as heros, where as it will if they are recruited in huge quantities and they unbalance the game
So I am going to err on the expensive side
But my other option is to make them less expensive but none commanders so that they have to be gift of reasoned. That pushes back their usefulness a long way although I suppose I could copy the spell and make a nation only version that has lower requirements.