A Better Bottom Line
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 2,257,300 EXP, the best of the 2 Lv 88 Weaver tradecraft leves that record EXP: the runner-up manages 1,703,250 EXP, 25% less.
On whether to wait: the best Lv 90 Weaver tradecraft leve returns 2,695,430 EXP per allowance, 19% more than the best on this rung, while the Lv 86 rung behind tops out at 1,922,600 EXP.
At Lv 88 this data holds 18 leves paying EXP across 2 categories: the 16 Tradecraft ones average 1,852,163 EXP per allowance, the 2 Fieldcraft ones 3,242,290 EXP, which puts this leve 22% above its own category's average.
AR-Caean Velvet Bottoms of Scouting ×1 is a Lv 89 Weaver recipe, 2 steps deep through 5 intermediates, costing 31 units of raw material and 64 crystals.
Handing that in returns 72,816 EXP and 163 gil for every unit of raw material the order swallows, and the tree needs Alchemist, Blacksmith, Leatherworker and Weaver.