Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, don’t be afraid to mix things up and explore different paths for your characters. Try to focus on unlocking key abilities early on to make battles easier.

For side quests, make sure to complete the Monster Arena challenges for some great rewards and tough battles. Also, don’t forget to unlock the Celestial Weapons for your party members by completing their respective side quests.

When it comes to character builds, try to specialize each character based on their strengths. For example, Tidus can be a fast physical attacker, Yuna can be a powerful white mage, and Auron can be a tanky powerhouse. Experiment with different abilities and see what works best for your playstyle. Happy exploring!