If you go with IS Boxer, which you had indicated in another thread...

Run the wizard.
That gets you a basic and functional interface.

Drag your spells/abilities onto "1" or "2" etc.
When you push "1".
No macros needed...
Each of the slaves will auto assist the main/active toon.
And all of them will do whatever you have on the "1" key.

Just make sure the IS Boxer addon is enabled for all toons.

I'm not sure of all the default commands.
But the quickstart guide will have the command for Follow.
And another to auto invite all members of your team.
That will get you started.

You would want to play with Repeater disabled but Keymaps enabled.
As your default state with IS Boxer.