Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, I recommend focusing on each character’s strengths. For example, Tidus is great for physical attacks, so prioritize upgrading his strength nodes. Don’t be afraid to mix and match different paths to create a well-rounded party.

For side quests, make sure to complete the Monster Arena challenges for rare items and customization options. The Celestial Weapons quests can be tough but are worth it for the powerful weapons. And don’t forget about the Al Bhed Primers hidden throughout Spira!

As for character builds, experiment with different abilities and spells to find what works best for your playstyle. Mixing magic and physical attacks can be effective, especially against tough bosses. And don’t neglect support abilities like Haste and Protect – they can be game-changers in difficult battles. Happy exploring!