I have to agree that you only need to get one of your wizards to the maximum crafting level, then have that wizard craft all your gear for your other wizards. I don't see any point in having my other wizards attain that level of crafting, unless it is for a training point, like the tea set in Celestia.
I've been playing on 3 months, with a level 70 in Zafaria.
- So far, I have achieved Legendary Crafter Rank. - I have made the Level 56 Wintertusk gear for myself, which is miles better than anything else I've seen. - And I'm working on Reagents for the Ninja Pigs Myth craftable spell (Because it's a great higher-damage, low-pip spell). And will get the other decent craftable spells. [NB: Not treasure cards, the actual spell]
As I understand it, the craftable gear CAN be traded to other Wizards on same account, but not sold at Auction. However, the spells you must craft yourself.
IMO, there is no point at all crafting anything other than what I mentioned above. Treasure cards and most gear you can buy somewhere else for far less than the cost of crafting.
I DO hope there is more reason to use crafting as I reach Avalon, Azteca, etc. I have no researched it.
There are many things about this game that make me sick. But I will enjoy what I can, and when the fun factor leaves, so do I.