Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
I mean let's face it. The glass cannons are squishy as HELL, so build some survivability HP. I mean ryze's Q skill is amazing so build Mana into as well? What do you got? DUH a perfet ryze build. Try it and see.
Now no clarity you'll have crazy mana.
I always take tele so if no like then change. But really its kind of simple thing.
The items mostly all deal good mana and AP.