Evasion & Accuracy

Evasion allows an attack to miss completely. It applies to enemy attacks regardless of damage school. A chaos bite is still an attack and can be evaded. Enemy spells cannot.

Evade chance formula

$$P_{\text{evade}} = \min\left( 75\%, \frac{E}{E + 1.2A_{\text{attacker}}} \right)$$

Here, $E$ is the defender’s evasion. Attacker accuracy has a minimum value of $1$ inside the formula.

Enemy accuracy currently scales with map tier:

$$A_{\text{enemy}} = 40 + 48T_{\text{map}}$$

This means deeper maps require progressively more evasion to preserve the same avoidance.

Tier examples

Map tier	Enemy accuracy	Evasion for about 50% evade	Evasion for the 75% cap
1	88	106	317
5	280	336	1,008
10	520	624	1,872
15	760	912	2,736

Values are approximate because the formula is evaluated continuously.

Entropy, not streaky randomness

Evasion uses an entropy accumulator:

$$e' = e + P_{\text{evade}}$$ $$\begin{cases} \text{evade and set } e \leftarrow e' - 1, & e' \ge 1 \\ \text{take the attack and set } e \leftarrow e', & e' < 1 \end{cases}$$

This spreads successful evades over time. At 40% evade chance, the long-run result is close to four evades per ten attacks without long pure-RNG streaks.

Block uses a separate entropy accumulator, so block outcomes do not correlate with evasion.

Sources of evasion and accuracy

Dexterity contributes both:

$$\mathrm{Dex}_{\text{effective}} = \frac{\mathrm{Dex}_{\text{raw}}} {1 + \mathrm{Dex}_{\text{raw}} / 100}$$ $$\begin{aligned} E_{\text{from Dex}} &= 3\mathrm{Dex}_{\text{effective}} \\ A_{\text{from Dex}} &= 3\mathrm{Dex}_{\text{effective}} \end{aligned}$$

The effective-attribute formula introduces diminishing returns. Equipment bases, affixes, implicits, and Disciplines supply additional flat and increased values.

Resolution order

For an incoming enemy attack:

1. roll entropy-based evasion;
2. if not evaded, roll entropy-based block;
3. mitigate each damage portion;
4. apply remaining damage to energy shield, then life.

For an incoming spell, step 1 is skipped. Spell suppression may halve the post-mitigation spell if block fails.