My Sole to Take

One allowance here buys 21,600 EXP, which places it 2nd of the 6 Lv 20 Leatherworker tradecraft leves that record EXP — a figure 2 other leves on the rung match exactly. The best of them, Open to Attack, returns 24,710 EXP for the same allowance, 14% more.

Across that rung the return runs from 4,440 EXP to 24,710 EXP per allowance — 4 distinct figures spanning 457%, so the wrong pick leaves 20,270 EXP of the allowance unspent.

On whether to wait: the best Lv 25 Leatherworker tradecraft leve returns 41,630 EXP per allowance, 68% more than the best on this rung, while the Lv 15 rung behind tops out at 18,910 EXP.

At Lv 20 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 17,352 EXP per allowance, the 4 Fieldcraft ones 113,304 EXP, which puts this leve 24% above its own category's average.

Gil ranks it differently: 232 gil per allowance is 4th of 6 on the same rung against 2nd on EXP, with the best there paying 295 gil.

Padded Leather Duckbills ×1 is a Lv 21 Leatherworker recipe, 4 steps deep through 6 intermediates, costing 6 units of raw material and 11 crystals.

Handing that in returns 3,600 EXP and 39 gil for every unit of raw material the order swallows, and the tree needs Leatherworker and Weaver.