The Tao of Rabbits

One allowance here buys 61,560 EXP, which places it 5th of the 6 Lv 40 Leatherworker tradecraft leves that record EXP. The best of them, Not So Alike in Dignity, returns 125,680 EXP for the same allowance, 104% more.

Across that rung the return runs from 17,230 EXP to 125,680 EXP per allowance — 5 distinct figures spanning 629%, so the wrong pick leaves 108,450 EXP of the allowance unspent.

On whether to wait: the best Lv 45 Leatherworker tradecraft leve returns 137,400 EXP per allowance, 9% more than the best on this rung, while the Lv 35 rung behind tops out at 94,160 EXP.

At Lv 40 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 72,545 EXP per allowance, the 4 Fieldcraft ones 560,212 EXP, which puts this leve 15% below its own category's average.

Boarskin Harness ×1 is a Lv 37 Leatherworker recipe, 2 steps deep through 3 intermediates, costing 10 units of raw material and 17 crystals.

Handing that in returns 6,156 EXP and 23 gil for every unit of raw material the order swallows, and the tree needs Blacksmith and Leatherworker.

The record carries a repeats value of 2. This site reads that as 2 further turn-ins on the same leve — an assumption, because the source data defines no meaning for the field — which would put the ceiling at 184,680 EXP and 699 gil for the 1 allowance it costs, or 184,680 EXP per allowance.