You don't need to do it all. That's like saying you're going to upgrade every relic for all your jobs. That's crazy.

It is better to focus on one, maybe two, that can help with your other jobs. I started with culinarian because I felt it was the easiest of the eight and was quickly able to get my i70 glasses and frypan. Now with desynth available, I have an easy way to attain more i70 glasses that I can break down on my goldsmith.

Sure, there are some people who probably do have all their i70 tools for every craft, but they probably also have large FCs to support them in the process.