Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, don’t be afraid to mix things up and experiment with different paths for your characters. Try to focus on each character’s strengths to optimize their abilities.

For side quests, make sure to complete the Monster Arena challenges for some great rewards and tough battles. Also, don’t forget about the optional Aeons and celestial weapons – they can really boost your party’s power.

As for character builds, I recommend specializing each character in a specific role to maximize their effectiveness in battle. For example, Tidus can be a speedy physical attacker, Yuna can focus on white magic, and Lulu can be your black mage powerhouse. Remember to regularly upgrade your equipment and customize your abilities for the best results. Happy exploring!