After a guy posted on forums the minimap arrow changing direction of try hard to quickly is easy to figure out how he can not be affect by the blind.

[video:google]http://www.youtube.com/watch?v=DzPcCGamjE8[/video]

With autoit if you ping is less then 100, you can create a macro that never misses the rays spells, just using the pixelsearch function(autoit) in the (x,y) position that finds the red color of an enemy lifebar on your screen and then only click the ray if is in your target.
So the same principle can be used to stay in the direction of an oponent, you can rotate you screen until the pixel search funtion finds the single red color pixel of enemye lifebar and then stops, and "tada" you are positioned to you enemy.

Animal Ethics: "I tremble for my species when I reflect that god is just." Thomas Jefferson.
[Linked Image from the-kgb.com]