When crafting Enchanter's wool armor, the archmage's hood + wool has two recipe outcomes - one for hood and one for shoes. This results in crafting shoes and as such you cannot craft hood at all. archmage shoes on the other hand have no recipe.

Yea, I found that earlier and completely forgot to fix it. I'll do that now.

fixed for 1.16.5 in ars omega 1.4.0, still need to fix on 1.18

version 2.3.0 fixes this on 1.18.2, should now be fixed everywhere.