Final Fantasy XIV Database - Ffxivpro.com

Yea, you could desynth and it would give you skill ups until level 4, but the question is is the lightning crystal risk worth the result?

Bone Chips are cheap, and currently cheaper then the cost of a Lightning Crystal. The reward isn't worth it in my opinion. Add on the fact that all desynths have an added risk, no matter what your level is there's a certain % that the desynth will fail, I've heard 25%? It's a losing game, the bone chip you get back won't be worth the lightning crystal you spent to get it.