Hold on Adamantite

One allowance here buys 421,420 EXP, which places it 2nd of the 3 Lv 58 Carpenter tradecraft leves that record EXP. The best of them, Anatomy of a Drill Bit, returns 484,390 EXP for the same allowance, 15% more.

Across that rung the return runs from 183,570 EXP to 484,390 EXP per allowance — 3 distinct figures spanning 164%, so the wrong pick leaves 300,820 EXP of the allowance unspent.

On whether to wait: the best Lv 60 Carpenter tradecraft leve returns 812,920 EXP per allowance, 68% more than the best on this rung, while the Lv 56 rung behind tops out at 656,800 EXP.

At Lv 58 this data holds 54 leves paying EXP across 3 categories: the 24 Tradecraft ones average 443,090 EXP per allowance, the 3 Fieldcraft ones 1,079,567 EXP and the 27 Grand Company ones 228,371 EXP, which puts this leve 5% below its own category's average.

Gil ranks it differently: 406 gil per allowance is 3rd of 3 on the same rung against 2nd on EXP, with the best there paying 1,186 gil.

Adamantite Spear ×1 is a Lv 58 Carpenter recipe, 2 steps deep through 5 intermediates, costing 34 units of raw material and 39 crystals.

Handing that in returns 12,395 EXP and 12 gil for every unit of raw material the order swallows, and the tree needs Alchemist, Blacksmith, Carpenter, Goldsmith and Leatherworker.