Each class has a different affinity to one stat or the other for example Ach gain bonus damage off of DEX where Gld gain a bonus in damage for having high VIT however they also need points in DEX to increase their block and parry. A Mrd is suppose to have high VIT but their damage will not increase thus making you split your points into VIT and STG , THM and ARC need INT to boost there attack damage but you again would need to place points in VIT and PIE so your not so squishy and have plenty of MP. I think that if you take the time to level each class to max and earn 240 point they should be carried between classes and Jobs so that if you choose to be a BkM you can max the Gldr and MRD roll to place 60 point in your health so you don't take away from being a heavy damage BKM. If we were to get it changed any you had 240 points to place where ever you want after going through all the lvling if you place them evenly between all 6 stats you would only be placing 40 points in each stat.