Hair Do No Harm

One allowance here buys 341,890 EXP, which places it 3rd of the 3 Lv 72 Weaver tradecraft leves that record EXP. The best of them, Suits You, returns 826,240 EXP for the same allowance, 142% more.

Across that rung the return runs from 341,890 EXP to 826,240 EXP per allowance — 3 distinct figures spanning 142%, so the wrong pick leaves 484,350 EXP of the allowance unspent.

On whether to wait: the best Lv 74 Weaver tradecraft leve returns 937,250 EXP per allowance, 13% more than the best on this rung, while the Lv 70 rung behind tops out at 820,510 EXP.

At Lv 72 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 590,811 EXP per allowance, the 3 Fieldcraft ones 1,405,338 EXP, which puts this leve 42% below its own category's average.

Iridescent Hat of Healing ×1 is a Lv 72 Weaver recipe, 3 steps deep through 4 intermediates, costing 18 units of raw material and 33 crystals.

Handing that in returns 18,994 EXP and 82 gil for every unit of raw material the order swallows, and the tree needs Leatherworker and Weaver.

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 1,025,670 EXP and 4,431 gil for the 1 allowance it costs, or 1,025,670 EXP per allowance.