Scarabs in Path of Exile don’t inherently stack in the traditional sense. You can’t combine multiple scarabs of the same type to increase their effect duration or potency. However, there are ways to achieve a similar outcome:
Using Multiple Scarabs:
The most straightforward approach is to use multiple scarabs of the same or different types in one map. Each scarab will activate its individual effect, potentially creating a more complex and rewarding map experience. Here are some examples:
Combining Encounter Scarabs: Use "Legion’s Carver" and "Ambush Scarab" together to guarantee both Legion and Incursion encounters within the map.
Stacking Effects: Combine a "Gilded Breach" with a "Polished Breach" scarab for a higher chance of getting extra Breach encounters and potentially better Breach rewards.
Atlas Passives:
Some Atlas passives on the passive tree enhance the effects of specific scarabs:
Increased Chance: Passives like "Harbinger’s Spark" or "Legion’s Domain" increase the base chance of encountering content tied to the respective scarabs (Harbingers or Legions). This effectively "stacks" with the scarab’s effect.
Additional Effects: Certain passives like "Ambush and Assault" grant bonus rewards for specific scarab interactions (e.g., extra Incursion rooms with Ambush scarabs).
Scarab Explosion:
This strategy utilizes a specific Archnemesis monster modifier ("Dropped Items are Converted to Scarabs") alongside map modifiers like "Rare Dropped Items are One Rarity Higher." When these conditions are met, defeating such a monster can trigger a "scarab explosion." This means a large number of scarabs are generated at once, depending on the converted items’ rarity, offering a temporary "stacking" effect.
Important Notes:
Alternatives to Stacking:
By understanding these mechanics, you can effectively utilize scarabs in Path of Exile to create challenging and rewarding map experiences.