If I'd a Koppranickel for Every Time...
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 160,470 EXP, which places it 3rd of the 3 Lv 62 Goldsmith tradecraft leves that record EXP. The best of them, Chain of Command, returns 486,300 EXP for the same allowance, 203% more.
Across that rung the return runs from 160,470 EXP to 486,300 EXP per allowance — 3 distinct figures spanning 203%, so the wrong pick leaves 325,830 EXP of the allowance unspent.
On whether to wait: the best Lv 64 Goldsmith tradecraft leve returns 709,140 EXP per allowance, 46% more than the best on this rung, while the Lv 60 rung behind tops out at 376,120 EXP.
At Lv 62 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 417,590 EXP per allowance, the 3 Fieldcraft ones 1,118,055 EXP, which puts this leve 62% below its own category's average.
Koppranickel Ingot ×1 is a Lv 62 Goldsmith recipe, 2 steps deep through 1 intermediate, costing 9 units of raw material and 6 crystals.
Handing that in returns 17,830 EXP and 55 gil for every unit of raw material the order swallows.
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 481,410 EXP and 1,488 gil for the 1 allowance it costs, or 481,410 EXP per allowance.