If you somehow would make it able to control all the rogues at the exact same time I doubt it would be flawless, wouldn't a lag spike mess everything up?
And why would you gear up 3 different lvl 70 rogues to do this? :P Just compound all their gears and I guess you would do almost as good lol...And why wanna go trough all the trouble for using 3 chars at once? xD
If you make it work good it would be pretty awesome though