Ranking

Your character's total level must be under 100 in order to rank skills without training them. However, you must reach a required total level before you can rank the skill again (e.g. total level of 10 allows an alchemist destined person to rank some skills to D before requiring to level up again (actually I'm not even sure about that...)). I don't know what the total should be before most skills are allowed to rank all the way from F to A, but I do know that you can't just get from F to A by having a total level of 1.