"So that's how it is huh, I just have to let a small gap appear between each layer" Karsha who understood the reason behind the layer shattering came up with a solution. By leaving gaps between the layers, the energy traveling through the walls will lose contact with the next layer, making each layer absorb new energy without overloading.
Each layer will absorb its new energy bringing down the power level of the attack for the next layer to absorb. "I can use this to build the fortress." Karsha seeing a way forward for the next level started formulating ways to build the strongest fortress.
The second level has to do with stacking up the Titan walls to create a strong enough fortress. While the fortress may not seem like a strong defense, it will all depend on Karsha. How he builds it will determine how strong the defense will be.
