Temporal Acceleration would be pretty good. I once read a manga where a guy could travel the speed of sound within a fixed radius of like 5 or 10 metres (I forgot) for a few moments.
Honestly speaking if you put your mind to it you could probably utilize the temporal acceleration and make it seem as though you’ve got an ability that is similar to that of the flash. Accelerating the time it takes you to do one thing and thus making it seem as though you’ve done it in an instant. Of course a drawback to that would be that you’re more than likely accelerating your age as well but it’s all in good theory lol