Ryze is Balanced

I was playing Ryze in an ARAM the other day, and there was a big fight. I popped ult, rushed in, did a bunch of damage, and the enemy started retreating. So we started chased, and then I realized. My ult was back up. So I popped it, and caught a few guys. They died, and now it was just the stragglers left. I then realized my ult was back up. Seriously.

40 second CD max rank on ult, and it gives 30% CDR, and everytime I go Super Saiyan It gets reduced by the CD of Q everytime I cast a spell, which about 2.5 seconds at that point.

40 seconds with 30% CDR is about 28 seconds. If I pop Arcane mastery once, I can get off about 4 spells, meaning it shaves off about ten seconds, reducing the cooldown to 18 seconds. It goes on cooldown the moment you cast it and lasts 6 seconds, meaning the real CD is about 12 seconds. 12 seconds, even without a full 40% CDR.