Slothskin Boots of Healing ★★★

Taken all the way down to base materials, one Slothskin Boots of Healing is 4 crafting steps deep and needs 6 intermediates — Ground Sloth Leather ×2, Grade 3 Reisui of Mind ×1, Imperial Jade ×1 and 3 others — which resolve to 14 distinct raw materials totalling 32 units, plus 27 crystals.

That bill outweighs 10,750 of the 13,602 recipes tracked here and 1,613 of the 1,844 Leatherworker ones, and 1 recipe nests deeper.

Only 4 of those crystals go into the final step; the other 23 are burned by the intermediates, so the real crystal cost is 6 Earth Cluster, 6 Fire Crystal, 5 Wind Crystal and 4 other kinds.

The chain crosses four disciplines — Leatherworker to Lv 70, Alchemist to Lv 70, Blacksmith to Lv 70 and Goldsmith to Lv 68 — so no single class can finish it unaided.

8 of the 14 raw materials come out of the ground, and 3 of them are time-gated: Gyr Abanian Spring Water (10:00, 22:00), Nightsteel Ore (6:00, 18:00) and 1 other. The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, High Steel Nugget has the widest use: 133 recipes call for it, spanning seven of the eight crafting classes.