Well, at the moment he is lv 67 and even i boost everything, his mn point is still around 580~ should i train more lv for him or is there another way to reach 720 mn?
Without hunting for my notes - would Marion's Intelligence spell (or a name like that) which boosts MN a lot not do the trick?
EDIT Just remembered - you might have to pay for the Intelligence Seminar, but that will get you up to the MN needed. I know that I was way below lvl 60 when I got this.