If you were a fighter what would you rather have?

If you were a Boxer and you had to chose, what would you rather have, the best defense in the game and I mean Mayweather and Whittaker combined type of defense?But hardly any power like Maliggnagi type of power.Or the hardest punch in the game, the kind of punch that as soon as it touched your opponents chin, it was a certainty that they would fall!But no defense at all. Which one would you rather have as a fighter and which one do you think would be more likely to retire undefeated?