How do avatars and apostles interact in apeiron gameplay?

Could you elaborate on the dynamics between avatars and apostles in apeiron gameplay? How do they collaborate or compete, and what impact does this have on the overall gameplay experience? Are there specific mechanics or strategies that encourage or hinder their interactions? Additionally, are there any unique challenges or advantages that come with being either an avatar or an apostle in this game? Understanding the intricacies of these roles and their interactions would provide valuable insight into the apeiron gaming experience.