Just for Kecks
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 8,460 EXP, the best of the 6 Lv 5 Weaver tradecraft leves that record EXP: the runner-up manages 6,840 EXP, 19% less.
Across that rung the return runs from 5,730 EXP to 8,460 EXP per allowance — 4 distinct figures spanning 48%, so the wrong pick leaves 2,730 EXP of the allowance unspent.
On whether to wait: the best Lv 10 Weaver tradecraft leve returns 13,090 EXP per allowance, 55% more than the best on this rung, while the Lv 1 rung behind tops out at 2,740 EXP.
At Lv 5 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 4,554 EXP per allowance, the 4 Fieldcraft ones 28,481 EXP, which puts this leve 86% above its own category's average.
Hempen Kecks ×1 is a Lv 8 Weaver recipe, 3 steps deep through 4 intermediates, costing 10 units of raw material and 9 crystals.
Handing that in returns 846 EXP and 17 gil for every unit of raw material the order swallows, and the tree needs Goldsmith, Leatherworker and Weaver.