Garden Anvil

Taken all the way down to base materials, one Garden Anvil is 3 crafting steps deep and needs 3 intermediates — Dwarven Mythril Ingot ×8, High Steel Ingot ×8 and High Steel Nugget ×8 — which resolve to 5 distinct raw materials totalling 112 units, plus 118 crystals.

That bill outweighs 13,494 of the 13,602 recipes tracked here and 1,925 of the 1,932 Blacksmith ones, and 337 recipes nest deeper.

Only 14 of those crystals go into the final step; the other 104 are burned by the intermediates, so the real crystal cost is 111 Fire Crystal and 7 Earth Crystal.

Every step is Blacksmith work, from a Lv 61 intermediate up to the Lv 80 finish, so one class covers the whole chain.

All 5 raw materials are gathered, and not one of their spots is timed, so nothing in the tree waits on the Eorzean clock.

Of the intermediates, Dwarven Mythril Ingot has the widest use: 168 recipes call for it, spanning seven of the eight crafting classes.