@sungsam: I said logically which is why I mentioned Fire melting Ice, ice freezing water, water quenching fire which is logically how it goes but In fiction we have seen stronger ice users beat weak fire users and strong fire users (Like Natsu) beat elements that fire should be weak against like water, wind etc. Saying stronger time Manipulator isn't a good answer, it's like saying a stronger fire Manipulator would beat a weaker one, duh! Which is why I stress the word 'logically'. Forget the user of the power, let's imagine they are of equal powers or skills, which powers logically beats Time manipulation? I am not interested in the user but the power itself and everyone here have been giving good answers. It seems you are the only one who didn't understand the question.