Characters in Dungeon Siege II have three attributes -- strength, dexterity, and intelligence -- which they improve by fighting in battles. Shown below are the benefits gained from each attribute.

Each point of Strength adds:
  • 2.50 to health
  • 0.05 to mana
  • 0.15-0.25 to melee damage
Each point of Dexterity adds:
  • 1.95 to health
  • 0.60 to mana
  • 0.15-0.25 to ranged damage
Each point of Intelligence adds:
  • 1.15 to health
  • 4.35 to mana
  • Magnitude and mana cost to spells (the exact amount depends on the spell)
Note: These numbers might not be perfectly accurate, but they are close.