Firstly, I take issue with your running on water limitation. I realize this is a for-fun conversation and everything but even Sonic the Hedgehog knows that water surfaces are nearly solid when there are adequate forces working on them. Geez. Anyway, I would use all four powers to invisibly float above a major city and telepathically-super-speed-manipulate a masturbatory aid onto myself and rain ejaculate on pedestrians. It would also cut down my commute considerably.