I might of been off a level or two in a couple spots on that leveling path, but I have done it solo for the most part on whm, rdm, blm, sch, blu, drg, sam up to 49 or 50 depending on if partnered up with someone in a spot using that path. Sch, Drg and Blu have done the whole thing. Mostly going lv 10ish gear lying around and RSE equipment when it became available for armor. And have multiple others was working on taking through it, just delayed by bonaza marbles eating up space. Just after Garlaige's bat and beetle page, it becomes really variable as to what locations work best. That whole mob hp going up faster than damage output, and different mobs TP moves can be a pain for different jobs.