Don't Sweat the Role
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 625,040 EXP, the best of the 3 Lv 66 Weaver tradecraft leves that record EXP: the runner-up manages 581,670 EXP, 7% less.
Across that rung the return runs from 510,240 EXP to 625,040 EXP per allowance — 3 distinct figures spanning 22%, so the wrong pick leaves 114,800 EXP of the allowance unspent.
On whether to wait: the best Lv 68 Weaver tradecraft leve returns 1,057,080 EXP per allowance, 69% more than the best on this rung, while the Lv 64 rung behind tops out at 929,220 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 22% above its own category's average.
Serge Turban of Crafting ×1 is a Lv 67 Weaver recipe, 4 steps deep through 7 intermediates, costing 33 units of raw material and 46 crystals.
Handing that in returns 18,941 EXP and 98 gil for every unit of raw material the order swallows, and the tree needs Alchemist, Goldsmith and Weaver.