All Diablo IV tools

Four tools covering both halves of Sanctuary math: how hard you hit, and how long you stand.

The bucket model: weapon, main stat, crit, vulnerable and additive damage — expected hit numbers.

Is +18% additive better than +20% crit damage? Marginal-gain math for your exact build.

Effective HP from life, armor and resistances — how many hits you actually survive.

Levels to your target, XP needed, and days of grinding at your real pace.

Guides that feed the tools

How damage works — The five buckets, why they multiply, and why additive damage feels weak.
Crit vs Vulnerable — Which bucket to feed on your affixes, depending on what you already have.
Survival math — Effective HP, armor curves, and why one-shots are a toughness problem.