Another Man's Ink
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 438,540 EXP, which places it 2nd of the 3 Lv 70 Alchemist tradecraft leves that record EXP. The best of them, Keeping Magic Alive, returns 693,190 EXP for the same allowance, 58% more.
Across that rung the return runs from 415,910 EXP to 693,190 EXP per allowance — 3 distinct figures spanning 67%, so the wrong pick leaves 277,280 EXP of the allowance unspent.
On whether to wait: the best Lv 72 Alchemist tradecraft leve returns 698,030 EXP per allowance, 1% more than the best on this rung, while the Lv 68 rung behind tops out at 681,530 EXP.
At Lv 70 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 433,208 EXP per allowance, the 3 Fieldcraft ones 1,302,824 EXP, which puts this leve 1% above its own category's average.
Enchanted Truegold Ink ×1 is a Lv 71 Alchemist recipe, a single step, costing 5 units of raw material and 6 crystals.
Handing that in returns 87,708 EXP and 384 gil for every unit of raw material the order swallows.