Pls help with bed defense

[GOD_RANVEER]

So guys me and my frnds play bedwars quads....we put clay first then wool...so it's a decent bed defense but as u all know every 2 layers bed defense has its weakness....
So I want a bed defense where the bed is protected from tnt and takes longer to break (no obsidian)

 

[Koko_]

Most of the people try the butterfly bed defence with is quite helpful.