The Deepest Cut

One allowance here buys 98,039 EXP, the best on the Lv 15 Fisher fieldcraft rung — matched exactly by 1 other leve of the 4 there, with the rest trailing at 58,824 EXP or less.

On whether to wait: the best Lv 20 Fisher fieldcraft leve returns 141,630 EXP per allowance, 44% more than the best on this rung, while the Lv 10 rung behind tops out at 54,594 EXP.

At Lv 15 this data holds 52 leves paying EXP across 2 categories: the 4 Fieldcraft ones average 78,432 EXP per allowance, the 48 Tradecraft ones 16,554 EXP, which puts this leve 25% above its own category's average.

Nothing on the turn-in list is craftable in this data: Razor Clam ×3 has no recipe here, so 3 units must come from gathering, a vendor or a drop.

Swiftperch, Western La Noscea issues 21 leves in this dataset, Lv 10 through Lv 15, across 2 disciplines.