Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, make sure to focus on each character’s strengths. For example, Tidus is great for agility and speed, so prioritize those nodes for him. Don’t be afraid to mix and match different paths on the sphere grid to create unique character builds.

As for side quests, be sure to complete the Monster Arena challenges for some great rewards and tough battles. Also, don’t miss out on the Celestial Weapons quests for ultimate weapons for your characters.

When it comes to character builds, consider customizing your characters with different abilities to complement each other in battle. For example, mix magic users with physical attackers for a well-rounded team. Experiment with different combinations to see what works best for your playstyle.

Happy exploring in Spira! Let me know if you have any more questions or need tips.