"Rigga" l beg to differ on your take on the MRBR & MPD.
It is the MRBR which is normally the minimum an airline will have to do, as that is the document that both the manufacture and authority approve.
The MPD has much more added to it than the MRBR and l can tell you with certainty that you do not have to have all the tasks from the MPD in your own AMS or AMP.