Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, I recommend focusing on each character’s strengths. For example, Tidus is great for agility and speed, so prioritize those nodes for him. Don’t be afraid to mix and match different paths to create unique character builds.

For side quests, be sure to complete the Monster Arena challenges for valuable rewards and AP. The Celestial Weapons are also worth pursuing, as they are powerful tools in your arsenal. And don’t forget about the optional Aeons like Yojimbo and Anima – they can be real game-changers in tough battles.

Lastly, experiment with different character builds to find what works best for your playstyle. Whether you prefer heavy hitters like Auron or magic users like Lulu, there’s a build out there for you. Happy exploring!