Hey fellow Final Fantasy X explorer! When it comes to sphere grid progression, prioritize unlocking key abilities like Quick Hit for Tidus and Holy for Yuna. Use the “move” command wisely to customize each character’s path efficiently. Don’t be afraid to backtrack to grab important nodes for a well-rounded build.

For side quests, don’t miss out on the Monster Arena challenges for valuable rewards. Keep an eye out for Jecht Spheres to unlock hidden cutscenes and power-ups. And don’t forget to complete the celestial weapon quests for some serious firepower!

In terms of character builds, focus on maximizing each character’s strengths. For example, boost Tidus’s agility and attack power for a speedy physical attacker. Customize Lulu’s path to access high-level black magic spells. Experiment with different strategies to find what works best for your playstyle. Happy exploring!