Vested Interest
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 703,720 EXP, the best of the 3 Lv 60 Leatherworker tradecraft leves that record EXP: the runner-up manages 236,350 EXP, 66% less.
Across that rung the return runs from 225,670 EXP to 703,720 EXP per allowance — 3 distinct figures spanning 212%, so the wrong pick leaves 478,050 EXP of the allowance unspent.
On whether to wait: the best Lv 62 Leatherworker tradecraft leve returns 595,710 EXP per allowance, 15% less than the best on this rung, while the Lv 58 rung behind tops out at 593,380 EXP.
At Lv 60 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 415,953 EXP per allowance, the 3 Fieldcraft ones 1,098,783 EXP, which puts this leve 69% above its own category's average.
Gaganaskin Vest ×1 is a Lv 61 Leatherworker recipe, 3 steps deep through 4 intermediates, costing 24 units of raw material and 21 crystals.
Handing that in returns 29,322 EXP and 104 gil for every unit of raw material the order swallows, and the tree needs Goldsmith, Leatherworker and Weaver.