In Diablo II you are rewarded with 5 attribute points by completing the quest Lam Esens Tome.

Rogues and in the Hellfire expansion Monks and Bards gain additional damage from Dexterity.

It is not affected by the damage on your weapon or by having damage modifiers on your weapon.

Each point of strength increases your damage by 1 of your weapons damage.

Dexterity also determines your ability to equip certain weapons, mostly ranged weapons and the chance to block an enemy attack if equipped with a shield.

Vitality is arguably the most useful stat due to the low base health that characters have, as well as the fact that health is much more effective than armor in terms of staying alive.

Each stat has a primary effect that increase the overall damage for specific classes.

The secondary effects are various forms of damage mitigiation that cater to various play styles.

After a character reaches level 36, the life gains from Vitality begin to go up by only 1 per point, up to level 60, where each point is 35 life (barring the X life bonuses).

Gaining a level within the range of 66-70 increases the gains by 5, up to 80 Life at level 70.

Spectrum is the only one-handed weapon that can roll as high as 923, due to all Core stats bonus.

Diablo 3 Attribute Dmg