Oddly enough my FSH alt did CUL and ALC to 60 before leveling anything else. But she is legacy, 1.x, when having an alt made sense and elements counted for something. Did it mostly on GC turnins. Don't go that route.

Everything to 15 = do all the recipes once, doable with stuff the guild shop has. CUL needs fish that can be bought at the hayline (sp?) just off the aftcastle.

You will have a hard time outfitting yourself from the class quests. But how about once you get 50 do the artisan's set quests? From: https://ffxiv.gamerescape.com/wiki/Talan

On your two chosen careers how about every recipe once? Including furniture and obsolete master book stuff?