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 speed and agility, while Auron excels in strength and defense. Don’t be afraid to mix and match different paths to create a well-rounded team.

For side quests, be sure to complete the Monster Arena challenges for some awesome rewards. Don’t forget about the optional Aeons like Yojimbo and Anima – they can be real game-changers in tough battles. And of course, the legendary Celestial Weapons are a must-have for taking on the toughest bosses.

Lastly, experiment with different character builds to find what works best for your playstyle. Whether you prefer a tanky defender, a speedy attacker, or a versatile support character, there are endless possibilities on the sphere grid. Happy exploring!