Ammo Skills
Ammo types enhance the Mercenary's Crossbow capabilities, offering unique buffs for various scenarios:

Armour Piercing Ammo: Pierces enemies, allowing effective damage to multiple targets.
Incendiary Ammo: Ignites enemies and Path of exile currency interacts with explosive effects.
Permafrost Ammo: Chills and freezes enemies, providing crowd control options.
Combining Ammo Skills with Crossbow Skills enables a variety of tactics, such as using Incendiary Burst Shot for AoE damage or Permafrost Power Shot for crowd control against stronger foes.

Attachments
Attachments are a new category of skill gems specific to Path of exile currency for sale Crossbow users. These provide an additional skill slot, allowing for more complex and varied builds. While they don’t offer additional stats, they enable unique interactions and can be empowered by Support Gems.

Examples of Attachments:
Grenade Skills: Skills that allow for explosive damage.
Interaction Mechanics: For instance, firing an Incendiary Rapid Shot may heat up the Crossbow, increasing grenade damage when fired subsequently.