Stucco cracks, I don't care how many layers you put on it. A stucco dome is inherently flawed no matter who builds it.
I take you up on this one
It took me a while, with some trial and error, but I developed a technique where stucco doesn't crack. I guaranty it for 1 year right now and about to change it to 2 years.
It cost me twice as much as to build it that way but it is trouble free, so absolutely worth it.