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Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 18,910 EXP, the best of the 6 Lv 15 Leatherworker tradecraft leves that record EXP: the runner-up manages 16,920 EXP, 11% less.
Across that rung the return runs from 6,110 EXP to 18,910 EXP per allowance — 6 distinct figures spanning 209%, so the wrong pick leaves 12,800 EXP of the allowance unspent.
On whether to wait: the best Lv 20 Leatherworker tradecraft leve returns 24,710 EXP per allowance, 31% more than the best on this rung, while the Lv 10 rung behind tops out at 9,990 EXP.
At Lv 15 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 16,554 EXP per allowance, the 4 Fieldcraft ones 78,432 EXP, which puts this leve 14% above its own category's average.
Gil ranks it differently: 174 gil per allowance is 6th of 6 on the same rung against 1st on EXP, with the best there paying 343 gil.
Hard Leather Skullcap ×1 is a Lv 17 Leatherworker recipe, 2 steps deep through 2 intermediates, costing 4 units of raw material and 5 crystals.
Handing that in returns 4,728 EXP and 44 gil for every unit of raw material the order swallows, and the tree needs Leatherworker and Weaver.