This is not a debate about what is the pillar but rather I was curious to see what everyone else's opinion was. If you could take three FFs and hope to see elements of gameplay and story structure be passed onto future FF installments what would it be? Try to be specific but any element is possible. IV's class system with VIII's world design crossed with X's combat system? VI's Character focus crossed with VII materia system crossed with IX's mini-games?

What three FF titles do you feel SE should use as the pillars of future FF games?