I think that if you don't have enough CE or ME To craft the item,
You should have to wait a period of time for the item to craft.
So say, If you have enough energy, its a Insta-Craft.
If you dont you have to wait, Let say 3 Days for a item worth 200 Energy.
Post some more suggestions Here to if you want to.
I don't understand you? You basically want to craft with a mist payment plan?
You're making it too easy to craft end-game gear.