While not specifically mentioned, it was also heavily implied that you’ll be able to PoE trade currency find Watchstones that can add modifiers to this section of your atlas as well. Sextants are also employed to the Watchstone rather than maps.
Sextants are no more level limited, but are rebalanced to possess much more powerful modifiers coming from higher tier sextants. Sextants have also been renamed to Prime Simple, and Awakened Sextants for every tier. They can no more be updated via the vendor, meaning that higher grade sextants could be more costly than simply three times the grade below it.
Zana will no longer offer the option to upgrade maps. This is because of the simple fact that maps no longer have set tiers, and can be upgraded with all the Watchstones. Zana will sell Elder and Shaper affected maps, which function as the sway would. The Shaper and Elder narrative lines have been replaced with the new boss story lines, meaning that these Shaped or Eldered maps will be the only way to reach the items that are observed within Shaper or Elder influence.
The Synthesis boss maps will drop as unique maps, permitting players regular access and not merely hoping that poe currency buy Zana will offer them. Particular maps will have a variable degree based on where they’re found, making all maps helpful at all points in the game.