Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, don’t be afraid to mix things up and explore different paths for your characters. It’s a good idea to focus on each character’s strengths to maximize their potential in battles. For side quests, make sure to complete the Monster Arena challenges for some great rewards and tough battles. Don’t forget to unlock celestial weapons and defeat the dark aeons for the ultimate challenge. Experiment with different character builds to find what works best for your playstyle and don’t be afraid to try out new strategies! Happy exploring!