A Time for Peace

One allowance here buys 415,910 EXP, which places it 3rd of the 3 Lv 70 Alchemist tradecraft leves that record EXP. The best of them, Keeping Magic Alive, returns 693,190 EXP for the same allowance, 67% more.

Across that rung the return runs from 415,910 EXP to 693,190 EXP per allowance — 3 distinct figures spanning 67%, so the wrong pick leaves 277,280 EXP of the allowance unspent.

On whether to wait: the best Lv 72 Alchemist tradecraft leve returns 698,030 EXP per allowance, 1% more than the best on this rung, while the Lv 68 rung behind tops out at 681,530 EXP.

At Lv 70 this data holds 27 leves paying EXP across 2 categories: the 24 Tradecraft ones average 433,208 EXP per allowance, the 3 Fieldcraft ones 1,302,824 EXP, which puts this leve 4% below its own category's average.

Smilodonskin Codex ×1 is a Lv 71 Alchemist recipe, 2 steps deep through 4 intermediates, costing 24 units of raw material and 39 crystals.

Handing that in returns 17,330 EXP and 58 gil for every unit of raw material the order swallows, and the tree needs Alchemist, Carpenter, Goldsmith and Leatherworker.

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 1,247,730 EXP and 4,161 gil for the 1 allowance it costs, or 1,247,730 EXP per allowance.