Eikon Leather ★★★

Taken all the way down to base materials, one Eikon Leather is 2 crafting steps deep and needs 1 intermediate — Camphor ×3 — which resolves to 3 distinct raw materials totalling 8 units, plus 9 crystals.

That bill outweighs 5,254 of the 13,602 recipes tracked here and 636 of the 1,844 Leatherworker ones, and 4,464 recipes nest deeper.

Only 5 of those crystals go into the final step; the other 4 are burned by the intermediates, so the real crystal cost is 3 Earth Cluster, 2 Lightning Cluster, 2 Water Cluster and 1 other kind.

The chain crosses two disciplines — Leatherworker to Lv 60 and Alchemist to Lv 60 — so no single class can finish it unaided.

2 of the 3 raw materials come out of the ground, and one of them is time-gated: Wattle Bark (2:00, 14:00). The widest gap between consecutive opening times is 12 Eorzean hours, about 35 real-world minutes.

Eikon Leather is itself consumed by 79 further recipes, spanning seven of the eight crafting classes.