Larian Studios Forums Divinity: Original Sin 2 Divinity - Original Sin 2 - General Staves compared to wands are terrible.

The ONLY way to use a staff effectively is to use it as a melee weapon... otherwise drop it. If you want to do damage switch to two wands, if you just want to use your spells use a wand and shield.

I don't even think two handers get better bonuses to make up for two lost slots.