A well developed 50+ INFJ will have a strong Ni that is able to analyze copious amounts of information both in the Fe and Ti modality and will also be able to use Se to communicate the "visions" in the real world.
So, you are saying that as time passes, they learn to use functions simultaneously and more effectively. However, if they don't hone their use of these functions, they wouldn't be able to effectively use them all in a way that works together in a particular order.