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. Focus on unlocking key abilities and stats that complement each character’s role in your party.

For side quests, make sure to complete the Monster Arena challenges for some great rewards and tough battles. Don’t forget about the celestial weapons and aeons quests for some powerful upgrades. And of course, the Al Bhed primers are worth collecting for some extra lore and a secret achievement.

In terms of character builds, try to specialize your characters to excel in specific roles. For example, focus on magic and magic defense for Yuna as a healer, strength and agility for Tidus as a physical attacker, and HP and defense for Auron as a tank. Mixing and matching abilities across the grid can also create unique hybrid builds for more versatile gameplay. Happy exploring!