An Integral Reward
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 1,457,380 EXP, which places it 2nd of the 2 Lv 88 Carpenter tradecraft leves that record EXP. The best of them, Annals of the Empire II, returns 2,297,800 EXP for the same allowance, 58% more.
On whether to wait: the best Lv 90 Carpenter tradecraft leve returns 1,440,660 EXP per allowance, 37% less than the best on this rung, while the Lv 86 rung behind tops out at 2,028,020 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 21% below its own category's average.
Gil ranks it differently: 5,040 gil per allowance is 1st of 2 on the same rung against 2nd on EXP, with the best there paying 5,040 gil.
Integral Necklace of Crafting ×1 is a Lv 89 Carpenter recipe, 3 steps deep through 4 intermediates, costing 18 units of raw material and 48 crystals.
Handing that in returns 80,966 EXP and 280 gil for every unit of raw material the order swallows, and the tree needs Carpenter, Goldsmith and Weaver.