Scarabs and Their Role in Path of Exile 2 Currency Expedition Zones
Scarabs are consumable items that add map modifiers when used. In Path of Exile 2:

Expedition Scarabs: These may exist to guarantee or increase Expedition encounters on maps.

Monster Quantity Scarabs: When used alongside Atlas nodes that boost monster density, these amplify the total monsters you face, increasing Logbook drop chances.

Item Quantity and Rarity Scarabs: Combined with Expedition loot quantity nodes, they raise the chance of higher rarity drops from excavations.

Strategy: Stack Expedition Scarabs with Atlas nodes and Remnants that enhance excavation and monster spawns for the best results.

Sextants and Map Device Interactions
Sextants add temporary modifiers to maps that can affect monster density, loot rarity, and other factors:

Expedition-Friendly Sextants: These may add excavation points or increase monster quality in Expedition zones.

Synergy with Atlas Nodes: Sextants that add monster packs or rare monster chance work well with Atlas nodes boosting monster rarity and quantity.

Boosting Boss Drops: Some sextants might increase boss reward quality, useful for cheap POE 2 Exalted Orbs Expedition bosses like Olroth.