It doesn't seem like the recipes have been updated in quite some time as most [if not all] recently added items are bereft of recipe information.
My suggestion would be to add a link to the recipe section for each item to allow users to submit recipes for items in a manner similar to how item sets are created. Submissions would be queued per item, and show the number of identical recipes submitted by distinct users. A curator can browse the queue and verify the most-submitted recipes against the wiki.
Links could also be added to existing recipes to allow users to submit corrections and/or updates such as ingredient changes/errors and main/sub skill level information.
Restrictions against spam/trolling would include a requirement for at least one verified character, a limit of X submissions per hour or day, the ability to ban users from the system, and a function to remove all submissions by a particular user from the queue.
I would imagine curators would be selected from FFXIAH community members active in the crafting forums.