Clairvoyance is a must for me. It'd allow me to see my enemies moves in battle, it could generate nice incomes in casinos (hehehe~) and such, you get the point, right?
The second would be either super speed (so I could make my own Blitz Move~) or instant regeneration on Rule level*.
* Rule level - granted by the primal rules that even after all atoms are desintegrated, the chosen will be recreated to it's original form
Hmm if we are assuming that others have supper powers than I would choose to have the same powers as Peter on Heroes, the ability to permanently obtain other peoples powers just by being in the same area as them, and then being able to use them and master them.
If we are the only ones with powers in this scenario then the power of space and time like Hiro in Heroes.