How Survival Actually Works

The other pages in this section explain each defensive formula. This page explains which of those formulas decide whether you live. The answers come from many recorded tier-10 deaths, not from theory, and several of them contradict the obvious reading of the numbers.

Resistance decides deaths, but only at the cap

Across the recorded tier-10 deaths, no killing blow arrived in a school the character had capped. Every death came through a school that sat below the cap.

Capping every school measured a 1.5x to 4.2x improvement in survival, depending on the class. Partial investment measured close to nothing. On one class it measured slightly worse than no investment at all, because the affix slots that held partial resistance could have held life or armour.

The reason is pack composition. Monster packs are homogeneous, so a pack delivers its damage in one or two schools inside a few seconds. Your average resistance never meets that burst. Your worst school meets it. A character at 75% fire, 75% cold, 75% lightning, and -20% chaos is a -20% chaos character whenever a chaos pack spawns.

Treat resistance as a pass or fail check per school, not as a stat to accumulate.

Deep maps take your resistance first

resPenaltyForTier subtracts 3.5 percentage points per tier above tier 1 from your uncapped totals. The penalty stops growing at 75 points, which the ladder reaches at tier 23. The result is then floored at -100%.

$$P_{\text{map}} = \min\left(75\%,\; 3.5\% \left(T_{\text{map}} - 1\right)\right)$$

Tier	Penalty	Uncapped resistance needed for a 75% cap
1	0%	75%
5	-14%	89%
10	-31.5%	105%
15	-49%	124%

Work the tier-10 line through. The penalty is $3.5\% \times 9 = 31.5\%$. A sheet that reads exactly 75% carries 75% uncapped, so the map leaves $75\% - 31.5\% = 43.5\%$. That character takes 56.5 damage from a 100 fire hit, not 25. To reach the cap inside the map, the same character needs 105% uncapped.

The hub sheet shows the capped value, so it reads 75% in both cases. Overcap is the hidden number that keeps you alive, and it is the reason a tier-10 character needs far more resistance on gear than the 75% cap suggests. See Resistances & Penetration for the full formula.

Chaos kills far above its share

Chaos is about 11% of incoming damage at tiers 8 to 10. It produced 30.3% of the recorded killing blows. The gap exists because characters leave chaos resistance negative while every other school sits at the cap.

“All resistances” does not include chaos. The “of the Prism” suffix reads “+X% to all Elemental Resistances”, and chaos is not an element. Elemental maximum-resistance effects skip chaos in the same way. This is deliberate design. Chaos is meant to have fewer suppliers than an element, so covering it costs a real choice.

Affixes that grant chaos resistance

Source	Name	Notes
Suffix	of Decay	Chaos resistance alone
Suffix	of Emberblight	Hybrid fire and chaos resistance
Suffix	of Frostblight	Hybrid cold and chaos resistance
Suffix	of Stormblight	Hybrid lightning and chaos resistance
Mythic suffix	of the Abyss	Raises the maximum chaos resistance; body, shield, necklace
Discipline	Vow Against Ruin	Bastion Oath lesser node, +12%
Discipline	Sealed Lips	Venom Cant lesser node, +12%

The four ordinary suffixes roll on all eight armour and jewellery slots: body, helmet, boots, gloves, shield, ring, earring, and necklace. The three hybrids are the efficient answer, because one suffix covers an element and chaos together. Plan for them early.

Item bases that carry a chaos implicit

Four bases roll a chaos-resistance implicit. Their map tiers matter more than their names:

Base	Slot	Drops from
Graveglass Band	Ring	Tier 7
Starless Shroud	Body	Tier 10
Voidstep Sandals	Boots	Tier 10
Voidglass Guard	Shield	Tier 10

The implicit route mostly arrives at the tier-10 wall, not before it. Only the ring is available while you push tiers 7 to 9, and the other three unlock at the depth where chaos is already killing you. Each of the four is also the rarest base in its family, so a specific one takes farming.

Helmet, gloves, necklace, earring, and weapon slots have no chaos implicit at any tier. The implicit is also small next to a suffix roll. Treat it as a top-up.

The practical reading: fix chaos with suffixes before tier 10. Craft or buy Emberblight, Frostblight, or Stormblight rolls on the slots you already wear. Add the four bases as they drop, and do not wait for them.

Death is a burst, not a drain

In the recorded deaths, the last three seconds removed about 76% of the character’s pool at the median. Characters did not bleed down over a fight. They stood at a healthy fraction of their pool, met one pack, and died.

Recovery cannot answer that. Energy shield recharge waits 3 seconds without a hit before it starts, and a burst resets the timer on every hit. Life regeneration pays out per second, so three seconds of it is a rounding error against 76% of a pool. Auto-potions hold at most 3 charges, sip once per second, and refill at roughly one charge per three kills.

Recovery therefore decides how you enter the next pack. Mitigation and avoidance decide whether you survive the pack you are in. Buy regeneration to shorten downtime, not to raise survival.

What each layer is worth

Measured shares of incoming damage at tier 5 and above:

Damage source	Share of incoming	Layer that answers it
Physical	~64%	Armour, evasion, block, life
Elemental (fire, cold, lightning)	~25%	Fire, cold, and lightning resistance
Chaos	~11%	Chaos resistance only
Damage over time	~3%	Resistance, then damage-over-time reduction

Two structural facts change how you read that table:

• Spells are about 15% of hits and cannot be evaded. An evasion build still needs block, spell suppression, and resistance, or 15% of hits arrive unreduced by its main defence.
• Armour reduces the physical portion only, and its value falls as hit size rises. See Armour & Physical Damage.

A practical priority order for defensive affix slots:

1. Chaos resistance, until the map-effective value reaches the cap.
2. Fire, cold, and lightning resistance, until the map-effective values reach the cap.
3. Life or energy shield, to raise the pool a burst has to clear.
4. Armour, evasion, block, or spell suppression, matched to your archetype.
5. Maximum-resistance effects, once every school already caps.

“Reduced damage over time taken” is the weakest common defensive affix, because it answers about 3% of incoming damage. Take it only when nothing above it is available.

If you are dying at tier 9 or 10, check these in order

1. Chaos resistance inside the map. Subtract the tier penalty from your uncapped chaos total. A negative result explains most deaths at this depth on its own. Fix it with suffixes, because three of the four chaos implicit bases only drop at tier 10.
2. Overcap on every school. At tier 10 you need 105% uncapped for a 75% map value. A sheet reading 75% is not enough.
3. Partial schools. Find your worst school and fix it. Adding more overcap to a school that already caps buys nothing until every school caps.
4. Pool size. A burst removes about three quarters of the pool. Raise life or energy shield so the same burst leaves you alive.
5. Spell coverage. If your defence is evasion, confirm you have block, suppression, or resistance for the 15% of hits that evasion cannot touch.
6. Wasted affixes. Replace damage-over-time reduction and stray partial resistances with any item on the priority list above.

Drop one tier while you fix the gaps. Tier 9 applies a 28% penalty instead of 31.5%, which is 3.5 points of resistance you no longer have to find on gear.