Hey fellow Final Fantasy VII strategist! When it comes to materia management, I recommend focusing on leveling up your most important materia like HP Up, Magic Up, and Elemental. For mission walkthroughs, always make sure to explore every corner of the map to find hidden items and secrets. When it comes to character development, try to specialize your characters to have specific roles like magic users, physical attackers, or support characters for a well-balanced party. Happy gaming!