I don't know if anyone mentioned but be careful about XIII-2's Crystarium system. if you want to get highest stats for your characters, don't light the sphere randomly.
basically there are big and small spheres, when light the BIG ones you will get role bonus. for example, when you use Attacker/Commando role to light the big sphere, in addition to the regular stats boost, you will get additional 2 points to ATK
here is the effect breakdown for each role when using big spheres to level them:
Attacker/Commando: attack+2
Blaster/Ravager: magic+2
Defender/Sentinel: HP+6
Healer/Medic: HP+6
Enhancer/Synergist: when level is an even number, HP+6 (for example, when you rise a level 1 Enhancer to level 2 using a big sphere, you will get extra 6 points to HP); when odd, magic+2
Jammer/Saboteur: even: attack+2; odd, magic+2
so let's say you want Noel to have max attack, you will need to use ONLY the big spheres to level attacker and jammer when its level number is even.