Well, you have basic tools to play with.

Mapped Keys, are usually keyboard short cuts.
They have a hotkey.
And send a keybind, to the client or client (slot/group) of your choice.
You can put your toons into Action Target Groups, probably make them by role or class, and use those as targets.

You also have Repeater, usually for mouse stuff.
You can split keyboard and mouse repeating.
Anytime you want all of the characters to do the same thing.
Whether it is click something, or all jump or whatever.

I haven't played SWG in forever.
But if a ground click makes your toons run to where was clicked.. then you probably don't want to broadcast random ground clicks.
Take a look at the macro system; I remember it was involved.
You will want your slaves (followers) to follow the master (main).
And to assist the main, for your attacks.