Scraptacular
Location
Rewards
What the allowance actually buys
One allowance here buys 1,314 gil, the best of the 3 Lv 64 Miner fieldcraft leves that record gil: the runner-up manages 917 gil, 30% less.
Across that rung the return runs from 804 gil to 1,314 gil per allowance — 3 distinct figures spanning 63%, so the wrong pick leaves 510 gil of the allowance unspent.
On whether to wait: the best Lv 66 Miner fieldcraft leve returns 1,147 gil per allowance, 13% less than the best on this rung, while the Lv 62 rung behind tops out at 974 gil.
At Lv 64 this data holds 33 leves paying gil across 2 categories: the 9 Fieldcraft ones average 1,164 gil per allowance, the 24 Tradecraft ones 1,873 gil, which puts this leve 13% above its own category's average.
Namai, Yanxia issues 9 leves in this dataset, Lv 62 through Lv 66, across 3 disciplines.