I Like Big Brush and I Cannot Lie
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 3,559,400 EXP, the best of the 2 Lv 94 Alchemist tradecraft leves that record EXP: the runner-up manages 1,902,430 EXP, 47% less.
On whether to wait: the best Lv 96 Alchemist tradecraft leve returns 4,125,360 EXP per allowance, 16% more than the best on this rung, while the Lv 92 rung behind tops out at 3,115,640 EXP.
At Lv 94 this data holds 18 leves paying EXP across 2 categories: the 16 Tradecraft ones average 2,447,593 EXP per allowance, the 2 Fieldcraft ones 5,803,754 EXP, which puts this leve 45% above its own category's average.
Dark Mahogany Round Brush ×1 is a Lv 94 Alchemist recipe, 3 steps deep through 5 intermediates, costing 31 units of raw material and 71 crystals.
Handing that in returns 114,819 EXP and 165 gil for every unit of raw material the order swallows, and the tree needs Alchemist, Carpenter and Goldsmith.