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

As for side quests, make sure to complete the monster arena challenges for some awesome rewards. And don’t forget to unlock the celestial weapons for your party members – they are super powerful! Finally, don’t rush through the sphere grid – take your time to plan out your path and maximize each character’s potential. Happy exploring!