I usually have QD's on any of them, so I can change out a scope easily if something happens to it. Have a spare scope set up in the same rings.
Same as MD for my heavy rifles. Personally, I know I'm not practiced enough to want to rely on open sights during a DG hunt. However, scopes can and will go bad on the heavy rifles so I always bring an extra scope set up with the same rings and sighted in so I can easily swap the scope out.
