The Rose and the Riveter (L)

At 10 allowances a run, this leve's 157,420 EXP works out to 15,742 EXP per allowance, which places it 3rd of the 3 Lv 58 Armorer Grand Company leves that record EXP. The best of them, Men in Adamantite (L), returns 446,249 EXP for the same allowance, 2,735% more.

Across that rung the return runs from 15,742 EXP to 446,249 EXP per allowance — 3 distinct figures spanning 2,735%, so the wrong pick leaves 430,507 EXP of the allowance unspent.

Nothing above Lv 58 is recorded for Armorer 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 93% below its own category's average.

Adamantite Rivets ×1 is a Lv 58 Blacksmith recipe, 2 steps deep through 1 intermediate, costing 6 units of raw material and 10 crystals.

Handing that in returns 26,237 EXP and 234 gil for every unit of raw material the order swallows.

The record carries a repeats value of 5. This site reads that as 5 further turn-ins on the same leve — an assumption, because the source data defines no meaning for the field — which would put the ceiling at 944,520 EXP and 8,424 gil for the 10 allowances it costs, or 94,452 EXP per allowance.