The Devil's Workshop

One allowance here buys 12,960 EXP, which places it 5th of the 6 Lv 20 Blacksmith tradecraft leves that record EXP — a figure 1 other leve on the rung matches exactly. The best of them, Unseamly Conditions, returns 21,600 EXP for the same allowance, 67% more.

On whether to wait: the best Lv 25 Blacksmith tradecraft leve returns 47,200 EXP per allowance, 119% more than the best on this rung, while the Lv 15 rung behind tops out at 18,910 EXP.

At Lv 20 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 17,352 EXP per allowance, the 4 Fieldcraft ones 113,304 EXP, which puts this leve 25% below its own category's average.

Gil ranks it differently: 125 gil per allowance is 6th of 6 on the same rung against 5th on EXP, with the best there paying 294 gil.

Brass Viking Sword ×1 is a Lv 20 Blacksmith recipe, 3 steps deep through 5 intermediates, costing 10 units of raw material and 8 crystals.

Handing that in returns 1,296 EXP and 13 gil for every unit of raw material the order swallows, and the tree needs Blacksmith, Goldsmith and Leatherworker.

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 38,880 EXP and 375 gil for the 1 allowance it costs, or 38,880 EXP per allowance.