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 things up and explore different paths to make your party diverse.

For side quests, be sure to unlock the Monster Arena by capturing fiends. It’s a great way to earn rewards and challenge yourself. Additionally, don’t forget about the Celestial Weapons quests for some powerful gear.

As for character builds, experiment with different abilities and spells to see what works best for your playstyle. Mixing physical attacks with magic can be very effective. And don’t neglect HP and defense nodes to keep your party sturdy in tough battles. Happy exploring!