Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, I recommend focusing on one path for each character to maximize their strengths. Don’t be afraid to backtrack to grab important nodes like stat boosts or new abilities.

For side quests, be sure to complete the Monster Arena challenges for some great rewards and tough battles. The Celestial Weapons are also a must-have for endgame content, so keep an eye out for those.

When building your characters, consider mixing up their roles for versatility in battle. For example, you can turn Tidus into a powerhouse physical attacker or a speedy support character with the right nodes. Experiment with different paths to find what works best for your playstyle. Happy exploring!