From the Sands to the Stage

One allowance here buys 6,840 EXP, the best of the 6 Lv 5 Leatherworker tradecraft leves that record EXP: the runner-up manages 5,220 EXP, 24% less.

Across that rung the return runs from 4,410 EXP to 6,840 EXP per allowance — 4 distinct figures spanning 55%, so the wrong pick leaves 2,430 EXP of the allowance unspent.

On whether to wait: the best Lv 10 Leatherworker tradecraft leve returns 9,990 EXP per allowance, 46% more than the best on this rung, while the Lv 1 rung behind tops out at 1,160 EXP.

At Lv 5 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 4,554 EXP per allowance, the 4 Fieldcraft ones 28,481 EXP, which puts this leve 50% above its own category's average.

Leather Himantes ×1 is a Lv 7 Leatherworker recipe, 3 steps deep through 4 intermediates, costing 7 units of raw material and 7 crystals.

Handing that in returns 977 EXP and 32 gil for every unit of raw material the order swallows, and the tree needs Blacksmith, Leatherworker and Weaver.