DL mainline travel--ALL active DL employees/ pass riders before partner employees/PR, all DL buddy pass before partner buddies. Yes, DL parent is same as active employee DOH.
Is that what you needed? Please let me know if I misunderstood.
My Comair friends/and their buddies board after my spouse's fam and his buddies.

Did you have an issue and would it help if I looked up the flight?