Something Salty and Ceremonial
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 4,125,360 EXP, the best of the 2 Lv 96 Alchemist tradecraft leves that record EXP: the runner-up manages 2,268,950 EXP, 45% less.
On whether to wait: the best Lv 98 Alchemist tradecraft leve returns 4,183,380 EXP per allowance, 1% more than the best on this rung, while the Lv 94 rung behind tops out at 3,559,400 EXP.
At Lv 96 this data holds 18 leves paying EXP across 2 categories: the 16 Tradecraft ones average 3,345,087 EXP per allowance, the 2 Fieldcraft ones 6,726,582 EXP, which puts this leve 23% above its own category's average.
Gomphotherium Codex ×1 is a Lv 96 Alchemist recipe, 2 steps deep through 4 intermediates, costing 32 units of raw material and 64 crystals.
Handing that in returns 128,918 EXP and 161 gil for every unit of raw material the order swallows, and the tree needs Alchemist, Carpenter, Goldsmith and Leatherworker.