A Real Grind
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 935,000 EXP, the best of the 2 Lv 80 Carpenter tradecraft leves that record EXP: the runner-up manages 724,620 EXP, 23% less.
On whether to wait: the best Lv 82 Carpenter tradecraft leve returns 846,040 EXP per allowance, 10% less than the best on this rung, while the Lv 78 rung behind tops out at 1,103,750 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 9% above its own category's average.
Horse Chestnut Grinding Wheel ×1 is a Lv 81 Carpenter recipe, 3 steps deep through 3 intermediates, costing 21 units of raw material and 55 crystals.
Handing that in returns 44,524 EXP and 233 gil for every unit of raw material the order swallows, and the tree needs Carpenter and Goldsmith.