Sample Class Tree

Warrior(Melee)->Paladin(Light)->Crusader(High Damage)
Warrior(Melee)->Paladin(Light)->Templar(High Health)
Warrior(Melee)->Death Knight(Dark)->Barbarian(High Damage)
Warrior(Melee)->Death Knight(Dark)->???
Mage(Wizard)->Cleric(Light)->Archmage(Powerful Spells)
Mage(Wizard)->Cleric(Light)->Priest(Healing Spells)
Mage(Wizard)->Sorcerer(Dark)->Cultist(Powerful Spells)
Mage(Wizard)->Sorcerer(Dark)->Necromancer(Summoning Spells)
Rogue(Stealth)->Thief(Light)->Archer(Good with Bows)
Rogue(Stealth)->Thief(Light)->Hunter(Good with Bows and Knives)
Rogue(Stealth)->Assassin(Dark)->Ninja(High Agility)
Rogue(Stealth)->Assassin(Dark)->Sniper(Good with Bows)