Still the Best

One allowance here buys 9,990 EXP, which places it 2nd of the 6 Lv 10 Armorer tradecraft leves that record EXP — a figure 2 other leves on the rung match exactly. The best of them, Greavous Losses, returns 13,090 EXP for the same allowance, 31% more.

Across that rung the return runs from 6,880 EXP to 13,090 EXP per allowance — 3 distinct figures spanning 90%, so the wrong pick leaves 6,210 EXP of the allowance unspent.

On whether to wait: the best Lv 15 Armorer tradecraft leve returns 18,910 EXP per allowance, 44% more than the best on this rung, while the Lv 5 rung behind tops out at 8,460 EXP.

At Lv 10 this data holds 52 leves paying EXP across 2 categories: the 48 Tradecraft ones average 8,265 EXP per allowance, the 4 Fieldcraft ones 43,676 EXP, which puts this leve 21% above its own category's average.

Brass Alembic ×1 is a Lv 15 Armorer recipe, 4 steps deep through 6 intermediates, costing 18 units of raw material and 13 crystals.

Handing that in returns 555 EXP and 18 gil for every unit of raw material the order swallows, and the tree needs Armorer, Blacksmith and Goldsmith.