Rarefied Dissolvent

Nothing in this list is craftable in turn, so one Rarefied Dissolvent is a single step: 8 units of material drawn from 3 base items, plus 7 crystals.

That bill outweighs 5,254 of the 13,602 recipes tracked here and 1,059 of the 1,591 Alchemist ones, and 9,374 recipes nest deeper.

2 of the 3 raw materials come out of the ground, and one of them is time-gated: Volcanic Rock Salt (17:00). That window comes round once per Eorzean day, every 70 real-world minutes.

Nothing in the data consumes Rarefied Dissolvent: it is one of 1 end product among the 5 Alchemist recipes at Lv 54.