Girding for Glory

One allowance here buys 820,510 EXP, the best of the 3 Lv 70 Leatherworker tradecraft leves that record EXP: the runner-up manages 341,780 EXP, 58% less.

Across that rung the return runs from 339,520 EXP to 820,510 EXP per allowance — 3 distinct figures spanning 142%, so the wrong pick leaves 480,990 EXP of the allowance unspent.

On whether to wait: the best Lv 72 Leatherworker tradecraft leve returns 826,240 EXP per allowance, 1% more than the best on this rung, while the Lv 68 rung behind tops out at 1,182,260 EXP.

At Lv 70 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 433,208 EXP per allowance, the 3 Fieldcraft ones 1,302,824 EXP, which puts this leve 89% above its own category's average.

Smilodonskin Trousers of Maiming ×1 is a Lv 71 Leatherworker recipe, 3 steps deep through 4 intermediates, costing 28 units of raw material and 42 crystals.

Handing that in returns 29,304 EXP and 137 gil for every unit of raw material the order swallows, and the tree needs Goldsmith, Leatherworker and Weaver.