I can't see his best builds having 600+ AP though. I mean, maybe. But I just don't expect that to be the way to go on him.
Edit: A 3 second delay on his W active? Maybe they should make it weaker but actually allow it to work sometimes

Unless the AoE is like, the whole screen. His ult only hits people standing where he was 4 seconds ago which is mainly going to hit enemies if you're retreating, which usually means you were losing. It's going to make for some serious turn around plays but also just whiff a whole lot.