Rylai's has completely broken Cassiopeia

This champ actually wouldn't be too bad if she didn't have a phage passive w/ Rylais and E's that chunk quarters of your health. She's also equally or slightly less tanky than your average bruiser, as well. Why play stuff that isn't ultra long range against Cassio? Engaging on her is practically a death sentence outside of something noncommital like an Elise cocoon or Syndra stun