Ink into Antiquity (L)

At 10 allowances a run, this leve's 4,025,300 EXP works out to 402,530 EXP per allowance, which places it 2nd of the 3 Lv 58 Alchemist Grand Company leves that record EXP. The best of them, A Gate Arcane Is Dragon's Bane (L), returns 446,249 EXP for the same allowance, 11% more.

Across that rung the return runs from 42,771 EXP to 446,249 EXP per allowance — 3 distinct figures spanning 943%, so the wrong pick leaves 403,478 EXP of the allowance unspent.

Nothing above Lv 58 is recorded for Alchemist Grand Company leves, so this rung is the ceiling at 446,249 EXP per allowance — 52% more than the Lv 56 rung below it.

At Lv 58 this data holds 54 leves paying EXP across 3 categories: the 27 Grand Company ones average 228,371 EXP per allowance, the 3 Fieldcraft ones 1,079,567 EXP and the 24 Tradecraft ones 443,090 EXP, which puts this leve 76% above its own category's average.

Enchanted Aurum Regis Ink ×5 is a Lv 58 Alchemist recipe, a single step, costing 35 units of raw material and 25 crystals over 5 crafts.

Handing that in returns 115,009 EXP and 160 gil for every unit of raw material the order swallows.