Culinary/fishing desynth is the easiest craft to lvl. I got mine to 60 just desynthing trash fish I got while lvling. I've got plenty of bait left over to keep going to 80+. Just doing goldsmith desynth first. Which gold desynth cost hundreds of thousands of Gil or much more time gathering up the mats required. Don't try and use desynth as an excuse, especially when it's the easiest one to lvl and cost less then 200k