Hey there, fellow Final Fantasy X explorer! When it comes to sphere grid progression, make sure to focus on unlocking key abilities for each character first before branching out. Prioritize HP, strength, and defense nodes to ensure your party can take on tough enemies.

For side quests, don’t miss out on the Monster Arena challenges for great rewards and the chance to capture rare fiends. The Celestial Weapons quests are also a must for unlocking ultimate weapons for each character. And don’t forget to complete the Al Bhed Primers collection for a special bonus at the end of the game!

As for character builds, consider customizing each character’s path on the sphere grid to fit your playstyle. Tidus excels in speed and agility, while Auron is a powerhouse in strength. Experiment with different paths to maximize each character’s potential and create a well-rounded party.

Happy exploring in Spira! May Yevon guide your journey.