I think cost values for the powers need to be tweaked. That, or double the benefits you get for each class. In practical terms you can't really do anything as an Exterminator (try fighting 3 or 4 opponents in a sparring match and see what happens) and the Hunter is the lowest, practical level.
Additionally, Legend needs at least 40 tokens for the power section based solely on how powerful the titans were implied to be. To support my point, I'll stat that out, and remind everything that fully grown, 'kill a city in one pass' tier dragons are only Menace class.
PL: Legend
Specialization: Big Game Hunter
Powers: Str (lvl 3, -8), Pre (lvl 3, -8), Reg (lvl 3, -6), End (lvl 3, -10), Improved Lung (lvl 2, -2), Beast Eye (lvl 2, -3), Stealth (lvl 2, -3)
Companions: Whelp, Cute Fairy
Equipment: Hook (lvl 4, -3), Weight Belt (lvl 3, Double, -5), Weapon (lvl 4, Longsword, Light, -12), Explosive Satchel (-15) Heavy Armor (Adamantium Plate, -9), Net (lvl 3, -4)
Challenges: Mega Yandere
Yeah, it's a powerful character, but it still doesn't take everything and the way you present Titans as basically Gods or Great Old Ones means that they're still stupidly dangerous.