Mangalomania
Location
Required Items
Rewards
What the allowance actually buys
One allowance here buys 1,083,940 EXP, which places it 2nd of the 2 Lv 86 Blacksmith tradecraft leves that record EXP. The best of them, Pruned to Perfection, returns 1,443,780 EXP for the same allowance, 33% more.
On whether to wait: the best Lv 88 Blacksmith tradecraft leve returns 2,297,800 EXP per allowance, 59% more than the best on this rung, while the Lv 84 rung behind tops out at 1,746,150 EXP.
At Lv 86 this data holds 18 leves paying EXP across 2 categories: the 16 Tradecraft ones average 1,557,007 EXP per allowance, the 2 Fieldcraft ones 2,953,920 EXP, which puts this leve 30% below its own category's average.
Manganese Ingot ×3 is a Lv 86 Blacksmith recipe, a single step, costing 18 units of raw material and 24 crystals over 3 crafts.
Handing that in returns 60,219 EXP and 138 gil for every unit of raw material the order swallows.