Let Faith Light the Way

One allowance here buys 555,260 EXP, the best of the 3 Lv 52 Armorer tradecraft leves that record EXP: the runner-up manages 331,500 EXP, 40% less.

Across that rung the return runs from 243,650 EXP to 555,260 EXP per allowance — 3 distinct figures spanning 128%, so the wrong pick leaves 311,610 EXP of the allowance unspent.

On whether to wait: the best Lv 54 Armorer tradecraft leve returns 473,220 EXP per allowance, 15% less than the best on this rung, while the Lv 50 rung behind tops out at 211,350 EXP.

At Lv 52 this data holds 54 leves paying EXP across 3 categories: the 24 Tradecraft ones average 337,743 EXP per allowance, the 3 Fieldcraft ones 868,208 EXP and the 27 Grand Company ones 177,755 EXP, which puts this leve 64% above its own category's average.

Mythrite Bladed Lantern Shield ×1 is a Lv 53 Armorer recipe, 3 steps deep through 4 intermediates, costing 48 units of raw material and 43 crystals.

Handing that in returns 11,568 EXP and 17 gil for every unit of raw material the order swallows, and the tree needs Armorer and Blacksmith.