Sole Traders

One allowance here buys 1,160 EXP, the best on the Lv 1 Leatherworker tradecraft rung — matched exactly by 1 other leve of the 6 there, with the rest trailing at 900 EXP or less.

Across that rung the return runs from 370 EXP to 1,160 EXP per allowance — 4 distinct figures spanning 214%, so the wrong pick leaves 790 EXP of the allowance unspent.

Lv 1 is the lowest rung this data records for Leatherworker tradecraft leves, and the next one, Lv 5, tops out at 6,840 EXP per allowance — 490% more than the best available here.

At Lv 1 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 1,110 EXP per allowance, the 4 Fieldcraft ones 19,656 EXP, which puts this leve 5% above its own category's average.

Leather Duckbills ×1 is a Lv 2 Leatherworker recipe, 3 steps deep through 3 intermediates, costing 3 units of raw material and 5 crystals.

Handing that in returns 387 EXP and 38 gil for every unit of raw material the order swallows, and the tree needs Leatherworker and Weaver.