Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, I recommend focusing on developing each character’s strengths. For example, Tidus is great for agility and speed, so prioritize those nodes for him.

Don’t forget to unlock key abilities like Quick Hit and Ultima for powerful attacks. As for side quests, be sure to tackle the Monster Arena challenges for great rewards and tough battles. Also, don’t miss out on the Celestial Weapons quests for some of the best gear in the game.

When it comes to character builds, consider mixing and matching different paths on the sphere grid to create versatile characters. Experiment with different abilities and see what works best for your playstyle. Happy exploring!