Late to the BLU Party

[Andevom]

How many of those solo experiences are still part of the multiplayer aspect of the game? For crafting/gathering, unless you're exclusively doing that stuff for yourself and that is without buying things or running group content to get mats, you're still doing multi-player things.

Even buying something off the MB is interacting with others.

Playing as a Blue Mage wouldn't automatically prevent you from interacting with other people. You and other Blue Mages can go out and hunt for abilities in the open world, and nothing is stopping you from doing that. It just wouldn't be required.