I'm not entirely sure, but it sounds like you are asking if there is any benefit to using 7 pieces of TBS? If that is your question, the answer is no — you only need 5 pieces to get the full benefit of the 5 piece bonus (+17% with 7 divines.)

Just make sure you have 5 pieces on both bars (i.e. all armor/jewelry, or if you're using TBS weapons make sure you have them on both your front and back bar) because otherwise your second mundus will drop off & not come back.