After S tier I have custom named tiers like legendary and godly that dont need to follow the expontential increase, often jumping up more than that. The main heroes in my web comic are S tier, comparable to roughly 1 million normal people. You might think of them as low level dragon ball z characters. Another character of equivalent power bats away a high powered canon ball with her sword and only dislocates her shoulder. And by high powered it was intended to destroy an entire village. :D