The Source of the Problem
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 901,955 EXP, which places it 3rd of the 3 Lv 70 Fisher fieldcraft leves that record EXP. The best of them, Eco-Warrior of Light, returns 1,503,258 EXP for the same allowance, 67% more.
On whether to wait: the best Lv 72 Fisher fieldcraft leve returns 1,621,544 EXP per allowance, 8% more than the best on this rung, while the Lv 68 rung behind tops out at 1,372,551 EXP.
At Lv 70 this data holds 27 leves paying EXP across 2 categories: the 3 Fieldcraft ones average 1,302,824 EXP per allowance, the 24 Tradecraft ones 433,208 EXP, which puts this leve 31% below its own category's average.
Nothing on the turn-in list is craftable in this data: Purple Ghost ×9 has no recipe here, so 9 units must come from gathering, a vendor or a drop.
The record carries a repeats value of 2. This site reads that as 2 further turn-ins on the same leve — an assumption, because the source data defines no meaning for the field — which would put the ceiling at 2,705,865 EXP and 1,950 gil for the 1 allowance it costs, or 2,705,865 EXP per allowance.