Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, don’t be afraid to mix things up and experiment with different paths for your characters. Try to focus on each character’s strengths – for example, Tidus is great for speed and agility, while Auron excels in strength and defense.

For side quests, make sure to complete the Monster Arena challenges for some great rewards and tough battles. Don’t forget about the legendary weapons and the celestial weapons – they can be a bit of a grind to obtain, but they’re totally worth it for the power they bring to your party.

As for character builds, consider customizing your sphere grid to optimize each character’s abilities. For example, you can turn Yuna into a powerful black mage or Lulu into a versatile spellcaster with some physical attack abilities. Just have fun experimenting and finding the best setups that suit your playstyle!