Nerf Blitz AP scaling.
I mean seriously. I know he isn't normally played as pure AP, but when his R takes half the health of a TANK in an Aram, that's a bit ridiculous.
EDIT: Since some people are asking about it, here is the game in question: http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2256013521/209948501?tab=builds&participant=3 based solely off of items, he had 600AP with a 35% MR pen.
His R: @ rank 3, deals 500 (+100% AP) damage, and passive deals 300 (+25% AP)
If his passive hit me before he activated it, I would have taken 450 damage, then 1100 damage. Thus, it would have been 1550 magic damage. Yes, it would be reduced a little from the MR I had, but since he had
it ignored most of it.