DarrinG,
Consider internally footing your 2016 with 1-3" of carbon shaft. Either blank carbon behind your 2016 insert or dispensing with the 2016 insert and using carbon with its own insert flush with the end of the 2016. That would significantly increase the strength of the front end, although you're moving the weak point in the shaft to the area immediately behind the internal footing. To guard against mushrooming, use a short external footing of aluminum (1" or so).
Total weight gain with both internal and external footings should be less than 50 grains and your shafts would be measurably stronger against bending, particularly up front.