My best record was 202wpm, and never reach that again somehow
You guys should try keybr.com, they watch on your mistake and give you the test that will slowly improve it through time, and it's really goood (except the typing competitive is really bad)
they have track on your improvement progress, that good for you to watch which key is faster through time and which is not.
my best on keybr.com is 141wpm
my best on 10FF is 202wpm and 10FF give you so simple words that you can always typing so fast with it.