I am a firm believer that time manipulation is the most superior power because it obviously trumps the other powers available. It is clearly a jack of all trades. The other popular powers can easily be defeated through flashing forward to the future, or skimming back to the past. No matter what power, time can find a way to defeat it.
Time is the only thing that keeps us going, and it is ultimately the one thing that stops us. We are obsessed with time. Always searching for ways to do more with less.