I leveled GSM and CUL in ARR, then just sorta let it slide. Leveled GSM in HW. Then let it slide a long time.

Leveled GSM first in SHB, having skipped it in Stormblood. At some point last year I got bored enough to level everything else to 80 with Leves in 100 leve spurts. EZ PZ. Especially the ones that got to reap Facet quest reward EXP, hooo boy. Leveling crafters is the easiest thing in the game to do other than login.