Nobody Can Farm Marl, but Marl (L)
Location
Rewards
What the allowance actually buys
At 10 allowances a run, this leve's 4,858 gil works out to 486 gil per allowance, which places it 3rd of the 3 Lv 56 battle Grand Company leves that record gil. The best of them, Just Washed (L), returns 954 gil for the same allowance, 96% more.
On whether to wait: the best Lv 58 battle Grand Company leve returns 1,035 gil per allowance, 8% more than the best on this rung, while the Lv 54 rung behind tops out at 853 gil.
At Lv 56 this data holds 72 leves paying gil across 4 categories: the 36 Grand Company ones average 448 gil per allowance, the 3 Battlecraft ones 1,296 gil and the 9 Fieldcraft ones 1,032 gil, which puts this leve 8% above its own category's average.
The Sea of Clouds issues 13 leves in this dataset, Lv 52 through Lv 56, across 4 disciplines.