Has anyone figured out how to get a targeting and assisting setup to work in warzones?

I currently made a simple one that uses my naga macro program to target my main window character and then follow then assist (AKA F3 then F7 then F8). Works great in a set group either 3man or 4man. Sucka in warzones and when one guy dies its ruined.

Any suggestions welcome. I love ISBOXER. I may move back to wow or to another game if I cannot figure this out.

Thanks in advance.