questions like that about the secrets of the great players. good luck, im the only one who reveals these strategies here
oh gosh dude please give us a break you secret of a great player. its just a damn undocumented interface feature, more commonly known as BUG you arseclown. just spam that "send attack" button to launch multiple attacks (almost) at the same time. you need to select less then 1/2 of army for 2 attacks, less than 1/3 for 3 attacks and so on. And of course, you need to click fast enough to place multiple clicks before the screen reloads.