Each point of strength increases armor by 4% and improves skills that rely the raw strength of you and your companions

Each point of Brutality grants Melee Attacks 0.02% more Damage per 1 Mana Cost (up to 20, multiplicative with other modifiers) and globally reduces Health Leech by 0.5%, instead of increasing your Armor. Brutality counts as Strength for skills and nodes that gain bonuses based on your Strength, and for conditional effects with a Strength requirement.