I literally typed non stop for 45 minutes to get it setup.

When I PiP swap to my windows (1-5 respectively) it sends F1 through F5 to everyone. Then the F1 macro in-game sets the focus to the character in slot 1. Then the macros look like this:

/focus <charactername>

Then my follow macro is:

/target @focus
/follow

And I have my follow button in ISBoxer as a two step button so that I can add one motif to each character each time I hit follow.