Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, my advice is to focus on each character’s strengths. Customize their paths to enhance their unique abilities. Don’t be afraid to backtrack to grab important nodes or activate key abilities.

For side quests, make sure to complete the Monster Arena challenges for great rewards and tough battles. Don’t forget about the celestial weapons and aeons quests for some powerful gear and ultimate summons.

As for character builds, experiment with different paths to find what works best for your playstyle. Whether you prefer a tanky Auron, a magical Lulu, or a speedy Tidus, there are endless possibilities to create a strong team. Just remember to have fun and enjoy the journey through Spira!