Courtly Lover's Filbert Brush ★★★★

Taken all the way down to base materials, one Courtly Lover's Filbert Brush is 2 crafting steps deep and needs 4 intermediates — Double Duraluminum Ingot ×3, Grade 4 Gemsap of Intelligence ×2, Urqopacha Linen ×2 and 1 other — which resolve to 12 distinct raw materials totalling 43 units, plus 50 crystals.

That bill outweighs 12,178 of the 13,602 recipes tracked here and 1,489 of the 1,591 Alchemist ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 44 are burned by the intermediates, so the real crystal cost is 12 Lightning Cluster, 9 Earth Cluster, 9 Fire Cluster and 3 other kinds.

The chain crosses three disciplines — Alchemist to Lv 100, Blacksmith to Lv 100 and Weaver to Lv 100 — so no single class can finish it unaided.

8 of the 12 raw materials come out of the ground, and 3 of them are time-gated: Dense Aluminum Ore (10:00, 22:00), Urqopacha Flax (6:00, 18:00) and 1 other. The widest gap between consecutive opening times is 4 Eorzean hours, about 12 real-world minutes.

Of the intermediates, Urqopacha Linen has the widest use: 52 recipes call for it, spanning five of the eight crafting classes.