Well, certain jobs are also just better than others for stats. Paladin is ideal for boosting a Hume's defense. Paravir (in addition to being just frelling awesome) has the highest Hume Strength growth, etcetera. So even if you want to make an ideal Archer, raising as a Paravir can be a huge help, etcetera. It can get really, really complicated if you want to push stats to their tops.

I actually created charts to calculate exactly how many levels I would need to get in each job to balance stats as perfectly as possible for my characters for my perfect save file.