Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, my tip is to focus on each character’s strengths. For example, Tidus is great for speed and agility, so prioritize nodes that enhance those stats for him.

For side quests, don’t miss out on the Celestial Weapons and Aeons. They can be a game-changer in tough battles. Make sure to complete the Monster Arena challenges too for some awesome rewards.

As for character builds, experiment with different paths on the sphere grid to suit your playstyle. Mixing magic and physical attributes can make your party versatile in battles. And don’t forget to use Key Spheres to unlock special abilities and power up your characters. Happy exploring!