Make Rylai's slow scale with champion level
That would prevent it from being oppressive during the laning phase on champions who continuously reapply it (Cass, Azir, etc.) while retaining it as a way to have more utility in lategame teamfights.
That would prevent it from being oppressive during the laning phase on champions who continuously reapply it (Cass, Azir, etc.) while retaining it as a way to have more utility in lategame teamfights.