If you use the /hotbar copy command it'll replace all the skills from the previous job with the corresponding ones from the new job.

For example: /hotbar copy ALC 1 current 1 <- This will replace everything on your first hotbar of the job you're on with all the skills you've set up on your first ALC hotbar. Then just switch between all your crafters re-running the command over and over. If you use different bars just change the 1 to the hotbar number, and the ALC to whichever crafter you want to copy from. With this command you just setup one crafter and then all the rest can have identical loadouts in about 15s.

Keep in mind the command should be used on non-shared hotbars.