The Bigger the Blade

One allowance here buys 512,790 EXP, which places it 2nd of the 3 Lv 66 Blacksmith tradecraft leves that record EXP. The best of them, Sea-saw, returns 625,040 EXP for the same allowance, 22% more.

Across that rung the return runs from 395,430 EXP to 625,040 EXP per allowance — 3 distinct figures spanning 58%, so the wrong pick leaves 229,610 EXP of the allowance unspent.

On whether to wait: the best Lv 68 Blacksmith tradecraft leve returns 806,710 EXP per allowance, 29% more than the best on this rung, while the Lv 64 rung behind tops out at 489,060 EXP.

At Lv 66 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 510,818 EXP per allowance, the 3 Fieldcraft ones 1,156,384 EXP, which puts this leve 0% above its own category's average.

Gil ranks it differently: 1,172 gil per allowance is 3rd of 3 on the same rung against 2nd on EXP, with the best there paying 3,245 gil.

Doman Steel Tachi ×1 is a Lv 67 Blacksmith recipe, 3 steps deep through 6 intermediates, costing 43 units of raw material and 52 crystals.

Handing that in returns 11,925 EXP and 27 gil for every unit of raw material the order swallows, and the tree needs Blacksmith, Carpenter, Goldsmith and Leatherworker.