Hey there, fellow Final Fantasy X explorer! When it comes to sphere grid progression, my advice is to focus on each character’s strengths. Don’t be afraid to mix and match different paths to create unique character builds. Make sure to prioritize unlocking key abilities like Quick Hit for Tidus or Doublecast for Lulu.

For side quests, be sure to complete the Monster Arena challenges for some great rewards and tough battles. Don’t forget about the Celestial Weapons and Aeons, as they can make a huge difference in your party’s power.

Lastly, experiment with different character builds to find what works best for your playstyle. Whether you prefer a tanky Auron, a mage-focused Yuna, or a speedy Tidus, there are plenty of options to customize your party. Happy exploring!