Changes

With the Assassin, Blizzard North are aiming at a mix of the Sorceress's projectile attacks with the Barbarian's melee attacks, the Traps allowing her to be more tactical when dealing with larger groups of monsters at once where the Barbarian can't. A fighter-mage combination, though she lacks the massive destructive powers of a Barbarian with Whirlwind her Martial Arts tree allows her to be a formidable hand to hand fighter.

As Diablo II and LoD rounds down figures displayed so you will see a discrepancy at times. With the example above with Mana reserves rising by 1.5 points each time the Assassin levels up, you will only see the figure rise by one but the 1.5 points of mana are applied in the game, it just rounds the display down.