Hey there, fellow Final Fantasy X explorer! When it comes to sphere grid progression, my tip is to focus on each character’s strengths. Customize their path to enhance their abilities in battle. Don’t be afraid to mix and match different paths to create a well-rounded team.

For side quests, make sure to complete the Monster Arena challenges for some great rewards and tough battles. Also, don’t forget about the Celestial Weapons – they pack a punch once fully powered up.

As for character builds, experiment with different abilities and see what works best for your playstyle. Whether you prefer heavy hitters like Tidus or magic users like Lulu, there’s a build out there for you. Just have fun exploring Spira and unlocking all it has to offer!