Yea, I set it up in ISboxer. When you setup a keymap, you can set it up manually to round robin, or you can let isboxer automatically round robin within the target group.

If you manually do it, you basically need a step for each character, tick the box at the top for do not pass for x seconds, set the timer, and then tell it to trigger once or not.

If you want isboxer to do it, you just tick the box for round robin on the side. You can setup the timer rules on the top just the same as if you did it manually, and it will apply those rules to each character in the target group.

I have it setup to an ATG for warriors. Each time I hit the hotkey, one of the warriors, rage permitting, will use hamstring. I'd recommend that you tell it to reset after X number of seconds, so that which warrior will more frequently hamstring is predictable, and you can pay attention to their rage more specifically. I'd also recommend you manually create the round robin group, because this way you know the exact order that your warriors will act. I'm not entirely sure how the automatic round robin function decides. I'd imagine by character slot, but you never know.