With Bearings Straight
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 70,850 EXP, which places it 3rd of the 3 Lv 50 Blacksmith tradecraft leves that record EXP. The best of them, Barring the Gates to Foundation, returns 456,810 EXP for the same allowance, 545% more.
Across that rung the return runs from 70,850 EXP to 456,810 EXP per allowance — 3 distinct figures spanning 545%, so the wrong pick leaves 385,960 EXP of the allowance unspent.
On whether to wait: the best Lv 52 Blacksmith tradecraft leve returns 629,850 EXP per allowance, 38% more than the best on this rung, while the Lv 45 rung behind tops out at 137,400 EXP.
At Lv 50 this data holds 54 leves paying EXP across 3 categories: the 24 Tradecraft ones average 238,216 EXP per allowance, the 3 Fieldcraft ones 834,862 EXP and the 27 Grand Company ones 132,961 EXP, which puts this leve 70% below its own category's average.
Mythrite Nugget ×1 is a Lv 51 Blacksmith recipe, a single step, costing 6 units of raw material and 3 crystals.
Handing that in returns 11,808 EXP and 38 gil for every unit of raw material the order swallows.
The record carries a repeats value of 2. This site reads that as 2 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 212,550 EXP and 675 gil for the 1 allowance it costs, or 212,550 EXP per allowance.