Hi spiritofdragons!
Firstly, thank you for playing ADW and I'm glad to hear you are enjoying it so far! I investigated your issue and yes, air mage ring is bugged! I'll patch it in the next small update, but actually there's currently no use for air mage rings so I'm sorry for your trouble. Earth Rogue ring, however, is useful for maxing the friendship bond with Katnir and unlocking his ultimate. I combed over it and couldn't find any error, along with crafting it for myself. Please double check your inventory for the heart of earth rogue, bit of earth rogue, and crafting fee of 50 gold. Also please check your game version is 2.X . I'm sorry for the issue! Please let me know more issues if it persists. T_T