Might be better to sort by Rarity so people can differentiate between 5 and 6 . For the top one , Mira would a good pick . Maybe Krantz or Nevsky once we get the Summoning Arts Lab revamp and everyone can use 6 units with her , although Thunder units are recommended because of how hard it hits . For the bottom one , I ' d go with Sera and Krantz . You need a Light element buffer to stop some of his threshold attacks , plus the mitigation is handy . Too bad there ' s no room to fit a BB fill when hit buffer , the RT attacks fill BB gauges up super fast with that . <| sep |> If you ' re in Tokyo , Koyama Driving School if you need to do it in English , or Rainbow Driving School if you can do it in Japanese is more reasonably priced .