Well here is my thoughts and what I've been instructed to do:
We start the decent at 5.5d and maintain a constant gradient down to MDA. The reason we start at 5.5d and not 8d is so that we have a constant decent rate down to mda (which helps during asymmetric approach). When we get to the mda we level off until reaching the MAP. However! The MAP is at the NDB and the NDB is half way down the runway, so there is no point in waiting for the MAP so we go around at 1d (this is approved by the IAA for our school). We aim to be at mda at 1d.