could you not add /click macaroonbutton** to your normal buttons, since your not possessed it will do bugger all, but when you are possessed it will utilise the /click....

just a thought, i had similar issues this weekend when doing drak tharon last boss. i ended up binding seperate keys on anothe bar to "8" & "9" which did a /click command to /target boss name then another /click to another button to macaroonbutton3 for bone shield etc.

Shit explanation i know but those who know the system might get the idea