They are pretty easy to level, 1 leve = 1 level (assuming 9 HQ's) so if you're going through 97 allowances then maybe level the other crafts to 15 so you can HQ the level turn in items for 200% XP bonus (and gil bonus). With a 200% bonus, if the leve gives you 10,000 XP you get 30,000XP, on a triple turn in that's 90,000XP. Later on when it hits 30k you're getting 270k XP per leve. Personally I dislike the 40/40 ones, much easier to HQ an 80/80 for the turn in bonus.