Simply the Best

One allowance here buys 8,430 EXP, which places it 3rd of the 6 Lv 10 Leatherworker tradecraft leves that record EXP — a figure 1 other leve on the rung matches exactly. The best of them, Only the Best, returns 9,990 EXP for the same allowance, 19% more.

Across that rung the return runs from 2,230 EXP to 9,990 EXP per allowance — 4 distinct figures spanning 348%, so the wrong pick leaves 7,760 EXP of the allowance unspent.

On whether to wait: the best Lv 15 Leatherworker tradecraft leve returns 18,910 EXP per allowance, 89% more than the best on this rung, while the Lv 5 rung behind tops out at 6,840 EXP.

At Lv 10 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 8,265 EXP per allowance, the 4 Fieldcraft ones 43,676 EXP, which puts this leve 2% above its own category's average.

Gil ranks it differently: 172 gil per allowance is 1st of 6 on the same rung against 3rd on EXP, with the best there paying 172 gil.

Hard Leather Caligae ×1 is a Lv 14 Leatherworker recipe, 3 steps deep through 3 intermediates, costing 5 units of raw material and 5 crystals.

Handing that in returns 1,686 EXP and 34 gil for every unit of raw material the order swallows, and the tree needs Blacksmith and Leatherworker.