Sorry but that is completely not at all what I am asking for.
Its not at all how my setup is configured either so its just not possible.
I run 1 instance of WoW with all the fluff, plugins, etc and at much higher resolutions - then I run 4 slaves in mini boxes with bare necessary plugins (basically just jamba and a few others).

I also use a swapping mechanism: F8-F12, swaps my mini-screens to the main screen and changes that character to leader in the group. So I can always have my main viewscreen to control any character as the "leader" if needed.

Regardless - I need to, regardless of which toon I am on, which invite order they joined group with, or if I'm partying with other people, I need to be able to hit numpad1 through numpad5, and correspondingly heal or cast spells at that party#.

I've been thinking about the logic on this and I'm not sure if its possible but its come down to realizing a few more things since I last posted:
1) Party5 doesnt exist I looked that up...its player + Party1-4
2) The FTL setup needs to be able to tell the other screens from where the numpad1-5 key was pressed, however - the FTL modifiers arent what the keypress should be in the end. Because the structure of the group changes with each character/wow-instance change.

So - quite a logical problem to solve for anyone who likes the challenge.
Its definitely bunking me...
Really want to have this functionality though. That will be awesome, for heals or any other kind of spell, even targetting...

This kind of feature I guess is basically expanding the FTL to FTLG === Focusless, Targetless, Leaderless, Groupless!
Because it is independant of your group (or order of your group).
Anyone want to become famous? Is an FTLG logical construct possible with the limitations we have with macroing?

Be interesting to see...
I'm quite new to macroing with all this stuff in wow, but I multi-boxed most of my life - I just usually used shell scripts and hardware to solve the issue. (quad-boxed in everquest 1 in 1998). Really cool to see the recent few years of great tools built for us multiboxers now...so much easier