The numbers <2> to <8> are usable to target allies in your party with macros.
Is there any way to target allies in the other two parties in an Alliance, via just the macro? For instance
/micon Verraise
/merror off
/ac Verraise <A3>
/ac Verraise <A4>
/ac Verraise <B3>
/ac Verraise <B4>
/ac Verraise <C3>
/ac Verraise <C4>
If putting <A#> made you target the corresponding member of Alliance A, this macro would let you immediately target downed healers from all parties, potentially saving the whole alliance from a wipe.

Is there anything of this kind? Targeting other alliances manually is a little clunky on keyboard/mouse and functionally near-impossible on controller.