Ryze
If he's going to be a tanky bursty sustained damage bruiser mage with a point click snare that scales off of mana, AP, and indirectly double-dips in AP, why is he manaless after his first back?
Ryze's current kit is fine. It's horribly overtuned, though. He should have a flat + percentage of current mana cost on all of his spells, and have some mana refund for landing his Q.