Yay~! This version seems BUSTED though. In constructed, this is 8 cards for five mana.
I think it is ok to make Maximize for 4 copies above the curve of power for three reasons. First, in limited you want Maximizing for 2 or 3 worth it as that maybe all the copies you get. Second, in constructed you will be able to cast Maximize for 4 only once per game. And lastly, when you draw multiples they become way worse. This card is still probably overpowered, but I think it would be fair just to bump both costs by one.