Another option that does not appear to have explored is to provide Korma with a separate feeding station that keeps him farther away from balance of flock. Place feeding station to extreme of range Korma uses to avoid dominant birds of main flock. If possible make it so Korma and feeding station are not in main flocks line of sight. I do this at time young adults of year disperse from natal flocks. Lower ranking birds in particular get the boot and transition is eased if those being booted have resources needed such as food, water, cover from predator and eventually a distinct roost. Over time the booted birds will often set up a territory and be able to keep others, from main flock from making incursions.