Holy Rainbow Shirt of Healing

Taken all the way down to base materials, one Holy Rainbow Shirt of Healing is 4 crafting steps deep and needs 7 intermediates — Holy Rainbow Cloth ×3, Mythrite Nugget ×1, Wyvern Leather ×1 and 4 others — which resolve to 9 distinct raw materials totalling 42 units, plus 40 crystals.

That bill outweighs 12,044 of the 13,602 recipes tracked here and 1,757 of the 1,968 Weaver ones, and 1 recipe nests deeper.

Only 7 of those crystals go into the final step; the other 33 are burned by the intermediates, so the real crystal cost is 23 Lightning Crystal, 6 Water Crystal, 3 Earth Crystal and 3 other kinds.

The chain crosses four disciplines — Weaver to Lv 53, Alchemist to Lv 52, Leatherworker to Lv 52 and Blacksmith to Lv 51 — so no single class can finish it unaided.

7 of the 9 raw materials come out of the ground, and 2 of them are time-gated: Coerthan Tea Leaves (0:00, 8:00, 10:00, 12:00, 20:00, 22:00) and Dravanian Mistletoe (0:00, 12:00). The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, Rainbow Thread has the widest use: 116 recipes call for it, spanning five of the eight crafting classes.