with ISBoxer its easy to do a round robin, make a keymap with 4 steps ( or 5 if your using 5 as healers) and just have a single action in each. first step pally 1 cast heal. second step pally 2 cast heal, ect ect. If your on the ISBoxer toolkit there is a link to the chatroom where I am sure you will get direct help to do that.