All Booked Up

One allowance here buys 21,830 EXP, which places it 5th of the 6 Lv 25 Goldsmith tradecraft leves that record EXP. The best of them, Keep the Change, returns 36,390 EXP for the same allowance, 67% more.

Across that rung the return runs from 18,490 EXP to 36,390 EXP per allowance — 4 distinct figures spanning 97%, so the wrong pick leaves 17,900 EXP of the allowance unspent.

On whether to wait: the best Lv 30 Goldsmith tradecraft leve returns 67,730 EXP per allowance, 86% more than the best on this rung, while the Lv 20 rung behind tops out at 21,600 EXP.

At Lv 25 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 31,772 EXP per allowance, the 4 Fieldcraft ones 204,269 EXP, which puts this leve 31% below its own category's average.

Silver Magnifiers ×1 is a Lv 25 Goldsmith recipe, 4 steps deep through 4 intermediates, costing 12 units of raw material and 22 crystals.

Handing that in returns 1,819 EXP and 22 gil for every unit of raw material the order swallows, and the tree needs Alchemist and Goldsmith.

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 65,490 EXP and 804 gil for the 1 allowance it costs, or 65,490 EXP per allowance.