Focus on the Wind team, as you have 2 components for a good Wind team: Gaia and Oberon. Your next Miracle ticket pick will preferably be SSR Cybele, but if she isn't available Hastur is a solid pick also. Since you have Oberon you have some flexibility with what Souls / EX ability to use. I'd probably go for Joan, and then Andromeda. Joan will allow you to chain guard against AoE overdrives indefinitely.