Blacksmith Leveling Guide
The 140 Blacksmith leves in this guide sit on 35 level rungs between Lv 1 and Lv 98, issued at 14 camps. Limsa Lominsa is the fixed point — it issues on every rung up to Lv 45 while the second issuer rotates through the field camps — and from Lv 50 up each rung has exactly one.
The best EXP per allowance on a rung climbs from 1,690 at Lv 1 to 4,664,730 at Lv 98, but the climb is not steady: 7 rungs pay less than the rung below, the worst being Lv 74 at 646,380, down 32% on Lv 72.
Picking within a rung can matter more than which rung you are on: at Lv 50 the 6 leves on the board pay between 11,808 and 456,810 EXP for the same single allowance, a gap of 38.7×.
32 of the 140 carry a repeat count of 2, and they pay less per turn-in than the one-shot leve beside them on 20 of the 21 rungs offering both. Counted as 6 turn-ins for a single allowance — the count is in the data, reading it as 6 deliveries is this site's assumption — the repeatable leve is still the better use of that allowance at 19 of those 21 rungs; take the one-shot at Lv 50, Lv 60.
Take the best leve on each of the 35 rungs and the Blacksmith ladder is worth 38,143,580 EXP for 35 allowances — 2nd of the 8 crafting guides, 3% behind Weaver.