Used a Single DPDT ( double pole double throw relay) and was able to have

fog light on with parking lights ( no fog dash indicator),
Auto mode and low beam Fogs on ( WITH fog dash indicator)
Hi beam +Low+ fogs ( no fog dash indicator)

Also fogs remain off with Auto/DRL mode unless auto switches over to low beams on then the fogs come on as well ( with fog light switch in the on position) .

So from the prospective of dash indicators keeps stock indicator conditions and fog light switch still operates like stock with added functionality for other headlight modes

Also as a fail safe if you leave your headlights on or in parking light mode after parking; the Stock ECU time out still works turning off ALL LIGHTs after time out....
You still have all lights continuous on after shut down if you cycle headlight switch after shutdown.