Please help! Who is appropriate to unlock potential to be 5* between Sharena or Kagero (+spd -def). My 5* are Ryoma, Corrin(M), Erika, Leo, Eldigan, Takumi, Julia (A lot of red type units.....T-T). I have no high tier Blue unit but I've heard that Kagero is very good, It difficult for me to decide because I love them both, so I ask you guys to help me to pick up for my best team.