I agree, Making the Monk's secondary skill 'Math Skill' and having that job mastered will make him an awesome unit. If you get him to learn all the calculatable Time and Oracle skills he'll be pretty decent. Since all of your units are Lv. 99 and prolly 99 exp, Exp 3 is the safest bet to calculate Haste on your party. Thats a nice edge to have starting a battle off. Or if you find a common thread in your enemies you can try to stop them or Dont Act them. Thats always fun.