Consistency is as equally as important as the amount of energy put into a spiritual working. Yes, amount of energy put into a spiritual working translates to greater effects. However, the same might not necessarily hold true if you are increasing the amount of energy because of lack of belief on your spiritual working due to being unable to see immediate results.
Suppose that you increase your energy breaths to 200 times. When you do not see the results that you desired, would you then consider increasing the energy breaths to 400 times ?
My advice is to have faith in your spiritual working and to be patient with it. You should read the three steps of witchcraft page of the JoS.
You could do the same working twice a day for greater effects. Do so only with the belief that you are doing to strengthen your working and not because you feel that a single working of 100 energy breaths is not enough.