With the new heating system implemented, there seems to be a regular pattern for the amount of crystals needed per level per * of a given item. If we could compile some data for this it would be hugely helpful for planning out crafts and the work involved in getting them.
I'm currently heating a 4* and plan to make a few more 5*s. I intend to create a 2-5* item that could gather some data, but solo it'll take me forever to grind the crystals and heat the items. Please post any crystal requirements for leveling, including the * item and the %.
Also, currently typing "crystals" leads to the minerals page...probably a better pathway could be made like "crystals" leads to disambiguation between minerals and heating crystals...idk. I dunno how to do it either.
I fixed the wiki page "Crystals" to redirect to "Crystal", which is already the disambiguation page you wanted. By the way, page titles are usually singular rather than plural.
I haven't heated anything since the update (or 2012, actually), so I can't help much with that part. Good luck.