Is a staff more powerful than a wand?

The biggest difference is staffs are FAR more powerful. To put it in context - a staff is to a wand what an RPG is to a pistol. The staffs of the Five Wizards from The Lord of The Rings.

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Subsequently, why do mages use wands?

They are typically used as a back-up for when the player runs out of mana. For low-level casters, a wand is often considered an effective means of killing a mob while saving their smaller mana pool for other spells, such as crowd control or healing. Is a wand a magic weapon? Magic weapons come in two primary types, staves and wands. Staves are two handed, slower weapons, while wands are main hand weapons and typically have higher attack speed. Wands cannot be dual-wielded, but most come with a book or orb of the same level which functions as an off-hand magic weapon.

Can you use a wand as a bonus action?

It appears that the general rule for bonus action spell casting still holds true for using magic wands. As the user is the one casting the spell, they are limited to the use of wands that produce cantrip spells, if they have already cast a spell with their bonus action. You can also ask is a wand a weapon? A wand is a ranged weapon that causes Arcane, Fire, Frost, Nature, Shadow or (in rare cases) Holy or Physical damage. They may be used by priests, mages, and warlocks. There is no restriction on the damage type that can be wielded and used; you can use wands outside your native damage capabilities.