Basically there are 2 types of auto attack.
- Attacking with our main hand (Right hand equip) - When pressing the Z key.
- Attacking with our off-hand (Left hand equip i.e:daggers, pistols, etc) - When pressing the C key.
For non-wizard class, Z attacks are based on physical attack whereas for Wizards, Z attacks are based on magic attack. Z attack speed for Wizard is also NOT INFLUENCED by dex.
For non-wizard class, C attacks are based on secondary physical attack same goes for Wizards, C attacks are also based on secondary physical attack. (YES, PHYSICAL ATTACK) C attack speed for wizard IS INFLUENCED by dex.
With this in mind, when u go dex build without str, you wont be dealing any damage, with C attacks. With exception of Power Staff as the unique equip boost your C attack based on your magic attack. Therefore, dex build wiz without Power Staff is not viable. However, you can go around this by using a biunt + dagger to boost your physical attack, but bare in mind, you would have to split your stat distribution to str and dex, even so, pure int wizard will always outdamage you.