Salt of the North
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 724,620 EXP, the best of the 2 Lv 80 Culinarian tradecraft leves that record EXP: the runner-up manages 696,220 EXP, 4% less.
On whether to wait: the best Lv 82 Culinarian tradecraft leve returns 1,062,190 EXP per allowance, 47% more than the best on this rung, while the Lv 78 rung behind tops out at 828,030 EXP.
At Lv 80 this data holds 18 leves paying EXP across 2 categories: the 16 Tradecraft ones average 854,332 EXP per allowance, the 2 Fieldcraft ones 2,459,716 EXP, which puts this leve 15% below its own category's average.
Northern Sea Salt ×9 is a Lv 81 Culinarian recipe, a single step, costing 18 units of raw material and 24 crystals over 3 crafts.
Handing that in returns 40,257 EXP and 136 gil for every unit of raw material the order swallows.