most tiring/difficult/tough stage of AM6?

[Shannon]

I can't spare the time to go back and get specific about what's different in stage X vs stage Y, but I can say that the goals of each stage are designed so that the hard stuff is spread out and in such a way that it's easier to accomplish, as well as with supporting statements in the beginning being grouped around them more tightly than later on, to make the beginning of each challenge easier. Over time, the challenges are progressively less buffered so you keep growing. The specific stage you find hardest or most challenging will therefore depend on what your particular challenges are, what level of growth you start with and how many of them you have.