If your ammonia is coming down, nitrites on the rise... Why do you want to add ammonia? The cycle you described implies that you are about to see a rise in nitrates. When this happens, and ammonia and nitrites are zero, your cycle is complete.

I don't like adding flakes as a means to speed a cycle. When you stop you have to introduce a bio load that equals the flakes in order to keep your bacteria fully functional.

Let her ride, when your nitrates start rising and the others are zero do a water change and add a fish.