If you already lost your immunity, you still can go afk safely by doing the following step:
Just go to a bird station / post in ROK / i believeit might works on clouds as well in KOS.
Just get yourself into the flight, then minimize your EQ2 window... once minimize your toon would actually suspended in mid-flight until you open your EQ2 window again. (Make sure your screen is minimize... not just changing focus).
Once your toon is suspended in mid air so high up that no one can attack you.
Now you can go bio or whatever and then come back to continue your flight.
