Fisher Leveling Guide
The 105 Fisher leves in this guide sit on 35 level rungs between Lv 1 and Lv 98, issued at 35 camps. 19 of those rungs are split between camps, so the route never settles for long; the longest stay is Namai, Yanxia across Lv 62–66.
The best EXP per allowance on a rung climbs from 19,656 at Lv 1 to 7,606,049 at Lv 98, and no rung on the way up pays less than the rung below it.
Picking within a rung can matter more than which rung you are on: at Lv 72 the 3 leves on the board pay between 972,926 and 1,621,544 EXP for the same single allowance, a gap of 1.7×.
33 of the 105 carry a repeat count of 2, and they pay less per turn-in than the one-shot leve beside them on every one of the 24 rungs offering both. Counted as 3 turn-ins for a single allowance — the count is in the data, reading it as 3 deliveries is this site's assumption — the repeatable leve is still the better use of that allowance at all 24 of them.
Take the best leve on each of the 35 rungs and the Fisher ladder is worth 51,368 gil for 35 allowances — the richest of the 3 gathering guides, 25% ahead of Miner at the other end. That comparison has to be made in gil: this is the only gathering guide whose leves record EXP at all, so the EXP figures above have no sibling to be measured against.