Elemental effectiveness table
The complete damage matrix from the game’s own Elemental Effectiveness screen. Read a row as the element you attack with — usually the converter you brought — and a column as the element the monster defends with.
| You attack with ↓ |  Neutral |  Water |  Fire |  Wind |  Earth |  Poison |  Holy |  Shadow |  Ghost |  Undead |
|---|---|---|---|---|---|---|---|---|---|---|
| Neutral | · | · | · | · | · | · | · | · | −30% | · |
| Water | · | −75% | +75% | −10% | · | · | −25% | · | · | · |
| Fire | · | −20% | −75% | · | +75% | · | −25% | · | · | +50% |
| Wind | · | +75% | · | −75% | −20% | · | −25% | · | · | · |
| Earth | · | · | −20% | +75% | −75% | · | −25% | · | · | · |
| Poison | · | +25% | +25% | +25% | +25% | −75% | −50% | −50% | · | −75% |
| Holy | · | · | · | · | · | · | −75% | +50% | · | +75% |
| Shadow | · | · | · | · | · | −50% | +50% | −75% | · | −75% |
| Ghost | −30% | · | · | · | · | · | −25% | −25% | +50% | +25% |
| Undead | · | · | · | · | · | −50% | +25% | −75% | · | −75% |
How to read it
A cell is the damage modifier in percent. +75% means you deal almost double; −75% means you deal a quarter. A blank cell is normal damage, and there are far more blanks than people expect — most pairings simply do nothing.
Converters exist for neutral, water, fire, wind and earth. Archers get holy as an extra option, which is why the planner sometimes shows a second recommendation.
Why the planner may not pick the strongest one
On a single-element map the choice is obvious: bring whatever gets +75%. Real maps are mixed, and that changes the goal — in AFK farming, what matters is that you keep one-shotting every monster there, not that you hit one of them very hard.
So the planner picks the converter with the best worst case, breaking ties by average. On a map with Wind and Water monsters, Earth (+75% on Wind, nothing on Water) beats Wind (+75% on Water but −75% on Wind) — the second option would double your damage on half the map and gut it on the other half, which is exactly how a hitkill run stops being a hitkill run.
Open the planner for the live, progress-aware answer based on your own MR.