The choice of the Metal Master in League of Legends depended on the game style and tactical needs. Here are some possible choices: [1. Aria: The combination of Metal Master and Aria can provide powerful control and support abilities.] The Metal Master's skill could control the enemy while Arilia's skill could interrupt the enemy's casting and cause damage. This combination could play an important role in team battles to help teammates control enemy heroes and defeat them. 2nd: A highly mobile hero that can move quickly and attack enemies. The Metal Master's skill allowed him to maintain control and make it easier for him to dodge enemy attacks. This combination could provide great mobility and flexibility in battle, making it difficult for the enemy to predict and respond. Zach: Zach is a high-explosive hero who can quickly create walls and Zach's Wall to stop enemy attacks. The Metal Master's skill allowed him to maintain control and make it easier for him to dodge enemy attacks. This combination could provide a strong defense and support ability in battle to help teammates protect teammates and prevent enemy attacks. 4 Lucian: Lucian is a highly mobile and explosive hero who can move quickly and attack enemies. The Metal Master's skill allowed him to maintain control and make it easier for him to dodge enemy attacks. This combination could provide great mobility and flexibility in battle, making it difficult for the enemy to predict and respond. These were just some of the possible choices. The specific combinations needed to be chosen according to the game style and tactical needs.