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 upgrading your main stats first before branching out to learn new abilities.

For side quests, make sure to complete the monster arena challenges for some great rewards and to unlock stronger enemies to battle. Don’t forget to visit the Cactuar Village and the Omega Ruins for some tough but rewarding encounters.

As for character builds, consider customizing your sphere grid to suit your playstyle. For example, Tidus can be a versatile character with high agility and evasion, while Auron can be a powerhouse with high strength and defense. Mix and match abilities and stats to create a balanced team that can handle any situation. Happy exploring!