Once you realize that the window isn't as small as you think, just watch, and pay attention. As soon as you see it, hit that key.
I personally have a battle home keys. 123. I'm only a level 7 pug, but 1 is heavy strikes, 2 is concussive blow, and 3 is haymaker. So I'm ready at all times for it. I see evade, i hit 3 (no matter what animation is going on).
I just did add light strikes, so I might have to change it. Ha.
Just relax. thats all.