the most "air-tight" napo defense as of now.
I've been using this defense again and again for some time, and not only does it utilize all the blocks it actually pushes out any GPO that tries to no-recoil damage the pearl.
While they COULD tp in, they can only damage the pearl once then get pushed out, so they have to keep using up more boosts.
Another thing I notice is that when you go out of sight then come back, the inner diagonal blocks actually go to the backmost layer, the concealment factor makes this a better defense imo.
To conclude this works well against GPO's but it's very annoying to repair since you need to get rid of the inner blocks to repair properly (more of a pain when you face a good bowhead).