Dark LegacyTips for enchanting.
1) Saving throw enchantments (reflex, willpower, etc) are unique: an item can only have one. A second attempt is refused and costs nothing.
2) Never enchant special resistances onto items, such as plus4 or resistant to magic. Such resistances will not show up, and will only use up enchantment space.
The game also finds it under: enchanting_tips, enchanting tips.