There are quite a few modifications I would make to this list.

My personal guide to alchemy looks more like this

Leves from 1-10(only takes a few days if that to get there with them)

10-16 crystals
16-21 Box turtles to Lightning crystals
21-26 Maple Syrup
26-32 Bone crayfish(or newts i guess) to lightning crystals
32-36 Lanolin
36-41 Sole to lightning crystals
41+ Clusters, Or lac, Dart frogs, Boar Leather