Have a look on fishwrecked as they have (had?) a thread with the locations of heaps of things (inc the adroit) that have been sunk out near the trench in 100m - 200m (and then some) but alot of people seem to focus on the sea containers and derwent.
Hapuka / grey band territory

PS if you are going to fish 150m+ use circle hooks and not mulies.. it sounds obvious but not for some!