Riot, I think you need to face facts

You cannot balance Ryze. There is no choice, you must delete him from the game or completely rework him. You can't balance high tankiness from items with high damage and huge spell spamming, he can put out more dps than fucking CASS now. The Ryze in my last game did 86.8k damage to champions almost double the second highest damaging champ on the enemy team while also taking almost as much damage as the Bard who built tank.