[Rurik]

Originally Posted by Sazelyt

I am thinking more like each heart starting its main attack to create the similar level of defense the gates provide - but the attack overpowering the heart resulting in the destruction of the heart.

Hmm, I see, your point was referring to the attack itself been used as a defense tool sort of what Kakashi did with Raikiri.

well, i will go with the belief that each attack should be still less resilient than one gate itself. One gate could contain Kiba attacks, whereas Kiba Attack could easily break Ukon/Sakon in Half.