Fire Sale
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 693,190 EXP, the best of the 3 Lv 70 Blacksmith tradecraft leves that record EXP: the runner-up manages 263,120 EXP, 62% less.
Across that rung the return runs from 214,460 EXP to 693,190 EXP per allowance — 3 distinct figures spanning 223%, so the wrong pick leaves 478,730 EXP of the allowance unspent.
On whether to wait: the best Lv 72 Blacksmith tradecraft leve returns 954,450 EXP per allowance, 38% more than the best on this rung, while the Lv 68 rung behind tops out at 806,710 EXP.
At Lv 70 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 433,208 EXP per allowance, the 3 Fieldcraft ones 1,302,824 EXP, which puts this leve 60% above its own category's average.
Deepgold Gunblade ×1 is a Lv 71 Blacksmith recipe, 2 steps deep through 3 intermediates, costing 25 units of raw material and 37 crystals.
Handing that in returns 27,728 EXP and 154 gil for every unit of raw material the order swallows, and the tree needs Blacksmith and Goldsmith.