No program can do that unless:

  • All characters are standing on exactly the same spot
  • All characters have exactly the same camera distance/yaw/pitch
  • All characters are facing exactly the same direction

Once the above three are satisfied, Octopus will click in exactly the same spot on all 5 clients.

Could you give me an example situation where mouseclick broadcasting (in Octopus, Keyclone, whatever) isn't working like you want it to work? Seriously. I've used it to hurricane, blizzard, rain of fire, Volley, all sorts of targeted AoE and as long as I had the group facing the same way and with the same camera views, I've never had a problem with it being far enough off to matter.