Later in the game you can have weapons with 3 enchantment slots, so I have used Poison / Fire Curse on melee weapons and Butcher on a bow (Increased Damage and Increased Magical Damage always being my first and second choice, when available).
Static Charge was always my first choice for jewellery, but some people like the damage or retribution auras. My second choice was usually Magic Damage Aura.
Before getting the battle tower there is a limit to how often you can change enchantments, so sometimes that means leaving a high level enchantment on something even if it isn't one of your preferred ones, or adding an enchantment you have the ingredients for after running out of your usual enchantment's requirements.
A poor enchantment you have the formula for is also arguably better than a good enchantment that you don't have the formula for yet.
