A Shoe In

One allowance here buys 783,880 EXP, which places it 3rd of the 3 Lv 78 Leatherworker tradecraft leves that record EXP. The best of them, Into the Storm, returns 1,606,520 EXP for the same allowance, 105% more.

Across that rung the return runs from 783,880 EXP to 1,606,520 EXP per allowance — 3 distinct figures spanning 105%, so the wrong pick leaves 822,640 EXP of the allowance unspent.

On whether to wait: the best Lv 80 Leatherworker tradecraft leve returns 935,000 EXP per allowance, 42% less than the best on this rung, while the Lv 76 rung behind tops out at 1,425,640 EXP.

At Lv 78 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 955,432 EXP per allowance, the 3 Fieldcraft ones 2,129,178 EXP, which puts this leve 18% below its own category's average.

Swallowskin Shoes of Healing ×1 is a Lv 79 Leatherworker recipe, 2 steps deep through 5 intermediates, costing 24 units of raw material and 45 crystals.

Handing that in returns 32,662 EXP and 73 gil for every unit of raw material the order swallows, and the tree needs Alchemist, Goldsmith, Leatherworker and Weaver.

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 2,351,640 EXP and 5,241 gil for the 1 allowance it costs, or 2,351,640 EXP per allowance.