The Incomplete Costume
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 1,582,910 EXP, the best of the 2 Lv 82 Armorer tradecraft leves that record EXP: the runner-up manages 1,051,810 EXP, 34% less.
On whether to wait: the best Lv 84 Armorer tradecraft leve returns 1,255,600 EXP per allowance, 21% less than the best on this rung, while the Lv 80 rung behind tops out at 935,000 EXP.
At Lv 82 this data holds 18 leves paying EXP across 2 categories: the 16 Tradecraft ones average 1,208,998 EXP per allowance, the 2 Fieldcraft ones 2,464,410 EXP, which puts this leve 31% above its own category's average.
High Durium Armor of Fending ×1 is a Lv 83 Armorer recipe, 2 steps deep through 4 intermediates, costing 33 units of raw material and 63 crystals.
Handing that in returns 47,967 EXP and 149 gil for every unit of raw material the order swallows, and the tree needs Armorer, Blacksmith, Goldsmith, Leatherworker and Weaver.