The problem I see there Perry is that a shock absorber is not a spring assister being designed primarily to dampen rebound reaction so will only have limited effect effect on the dynamics of a sudden compression over a bump and less still on a longer duration compression. Tightening an adjustable shock absorber to the point where it limits bottoming out would maybe create an unnecessarily stiff ride at other times. That's why I suggested above you need both dampers and bump stops. If you wanted to narrow the cure down I would have started with bump stops first.
