What's stopping you from going and chaining mobs right now? It's my primary way of leveling up, plus my chocobo gets exp, too. It might not be the most efficient way of leveling a class or job, but it's the way I enjoy doing it. Maybe I'm too old fashioned.

Try setting up a PF for chaining mobs. You'll find that there are actually other people that enjoy that style, too! The game isn't supposed to be a race to get to the end as fast as you can, at least not in my opinion. Enjoy playing the way you want to.