Did not mean it to be unhelpful.
Sorry if it came across that way.


The IS Boxer thing is basically generic mouse broadcasting.
Or possibly the send next click option.

I like to use Action Target Groups.
I have three of them, for ground target effects.
Ground Click 4, Ground Click 5, and Ground Click Shift A.
Or similar names to those.

On my FTL DPS 4 key, I have the box checked, Send Next Click.
Also have KVM mode checked, so the click does not affect the active window.
And set the target to Ground Click 4, so anyone in that group will receive the click.
Ditto for 5 and Shift A.

Not everyone on all teams (particularly mixed teams) has AoE effects on the same key.
Or even if they do, something like Holy Nova does not require targeting, so no need for Send Next Click.