Which one?

[IceSpear]

Level Botany!

Really you shouldn't craft unless you're in it for the fun of being a DoH as much as you're in it for the gil.

Neri's desynth guide is here on this forum.

I would add that at lvl 80 PvP was my favorite option. 1 victory equals 1 earring accessory, which is essentially a free chance at BC3 & desynth XP.

Alternatives would be i70+ dungeon drop jewelry, which has the RNG of the loot system to decide whether or not you'll even get the drop. Rose Gold Clasp require 9 peacock ore per ingot so that is an investment.

PvP jewelry is free tho

Thanks for the pvp tip! Never really played pvp much, but this'll give me an excuse now lol.