Okay, so there are 13 enchantment types for weapons (1-2 slots), 18 enchantment types for jewelry (3 slots) and... only 3 enchantment types for armor??? (8 slots)
This distribution makes no sense, and it kind of begs the question of what the point of Enchanting is if most of the slots are only ever going to have one of three enchantments in them?
Why not just make all jewelry enchantments also be for armor, but with the same Overcharge system that limits character stats in place to limit enchantment stacking, and hence promote variety of enchantments used?