Calculate your effective health pool and damage reduction across multiple games
From skills, passives, and items
Temporary health from fortify/shields
Damage absorption shields
All defensive layers multiply together. Stacking different types (armor + resistance + DR) is more effective than focusing on one.
EHP = Base Health / (1 - Total Mitigation)
EHP represents how much raw damage you can take before dying. A character with 1000 HP and 50% mitigation has 2000 EHP.
Total = 1 - (1 - Armor) × (1 - Resistance) × (1 - DR)
Defense layers multiply together. 50% armor + 50% resistance = 75% total mitigation, not 100%. This prevents becoming invincible.
Each game has different armor formulas and caps
Armor effectiveness follows diminishing returns. The first 5000 armor gives more protection than the next 5000. Most games cap armor mitigation at 75-90%.
Balance all defensive layers instead of stacking one. For example, 50% armor, 75% resistance, and 30% DR is better than 90% armor with no resistance. Diversification is key to maximum survivability.