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 their strengths – for example, magic for Lulu and physical attacks for Tidus. Don’t forget to use the Expert Sphere Grid for more flexibility.

For side quests, be sure to complete the Monster Arena challenges for valuable rewards and tough battles. The Celestial Weapons quests can be challenging but are worth it for the ultimate weapons. And don’t miss out on the optional Aeons like Yojimbo and Anima – they can be real game-changers in tough battles.

As for character builds, experiment with different abilities and mix up your party based on the enemies you’re facing. Customize your characters with abilities from the Sphere Grid that complement their roles in battle. And always keep an eye out for key abilities like Quick Hit and Ultima to maximize your party’s potential. Happy exploring!