Hey there, fellow Final Fantasy X enthusiast! When it comes to the sphere grid, my top tip is to focus on one path for each character initially to maximize their strengths. Don’t be afraid to backtrack to grab important nodes like stat boosts or new abilities.

For side quests, make sure to complete the Monster Arena challenges for some sweet rewards and tough battles. Don’t forget about the Celestial Weapons either – they pack a serious punch once fully powered up.

As for character builds, experiment with mixing different paths to create versatile fighters. For example, you can blend Tidus’s speed with Wakka’s accuracy for a deadly combo. And don’t overlook support abilities like Auto-Life or Quick Hit – they can turn the tide in tough battles. Happy exploring!