He was able to use Requip without conscious thought so it didn’t need any work. Erza had taught him her special type of Requip and he kept his clothes and armors in there for better storage. He knew he needed to work on his Celestial magic so he mentally sorted everything. His mindscape was a glorious library of his vast knowledge but it had great defenses. Each book was cursed. Only he could go through his mind without being harmed. 