A Rock After My Own Heart
Location
Rewards
What the allowance actually buys
One allowance here buys 2,132 gil, the best of the 3 Lv 84 Miner fieldcraft leves that record gil: the runner-up manages 1,944 gil, 9% less.
Across that rung the return runs from 1,794 gil to 2,132 gil per allowance — 3 distinct figures spanning 19%, so the wrong pick leaves 338 gil of the allowance unspent.
On whether to wait: the best Lv 86 Miner fieldcraft leve returns 2,176 gil per allowance, 2% more than the best on this rung, while the Lv 82 rung behind tops out at 2,088 gil.
At Lv 84 this data holds 24 leves paying gil across 2 categories: the 8 Fieldcraft ones average 2,045 gil per allowance, the 16 Tradecraft ones 4,178 gil, which puts this leve 4% above its own category's average.
Tertium, Garlemald issues 6 leves in this dataset, all of them Lv 84, across 2 disciplines.