Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, always focus on maximizing your characters’ strengths. Don’t be afraid to branch out to adjacent nodes to learn new abilities. For side quests, make sure to complete the Monster Arena challenges for valuable rewards. And for character builds, tailor each one to fit your playstyle – whether you prefer Tidus as a speedy attacker or Lulu as a powerful mage. Enjoy your journey through Spira!