I have separate ATG's for each of my assorted Ground Click (mouse broadcasting) hotkeys.
Between all of my teams, I have ground click effects on 4, 5, and Shift A.

I have three ATG's for these keys.
- Ground 4
- Ground 5
- Grouns Shift A

My 4 key, in addition to all the normal stuff, also turns on mouse broadcasting (send next click) to all members of the Ground 4 group.
Ditto for the 5 key, and the Shift A mapped key I have made.

Not every member of each team will AoE (Blizzard, Hurricane, etc) on the press, but then the broadcasted click is only going to members of those ATG's.



I also use ATG's, for my repeater region based healing.
An ATG is the recipient of the click.

So when I move my mouse into the Grid frame and click, the Healer ATG receives the click.
I then have mapped keys, which:
a) change a toon to their healer spec
b) add them to the Healer ATG

So when I click the Grid frame for heals, the new toon now also receives the click.

Similarly, I can remove a toon from the Healer ATG.
And change their spec, on a press of another mapped key (or the same one, if I gave it multiple steps).