One improvement for any software/hardware is to sync your views. You can position your camera for every client, as desired. And then save the view; you have 5 views you can save. Then you can preface your Hurricane (or any ground target spell) with /script SetView(4);SetView(4) - using the view number you saved.

For KC, the fastest and probably best option will be to have Hurricane on the same hotkey, and to rapidly move your mouse to each slave window in turn, quickly positioning the circle and clicking.

If you want to be good with mouse click spells, look into an HKN script specifically for mouse broadcasting.

Or move to IS Boxer, as that is an extremely powerful software which can basically do anything that wow allows, and once you understand the basics is very easy to configure too.