You shouldnt bind illumination with dawn, there are many ocasions where you'll want to use illumination alone and saving dawn for something else.
what you want is a simple rouse+dawn, same cd, so they should always be used together.
/micon 'Whispering Dawn"
/ac "Rouse" <pet>
/pac "Whispering Dawn" <me>

Key bind the other 2 eos abilities and use them proprelly.
you can always use illumination(on your keybind) and pop the macro as soon the skill go out.