I think the hard part with this are the variables. It is not just what supplement and how much it has in it but what feeders are being used, size of feeders, hydration, overall husbandry including T5 lighting.
The issue and reason why I still supplement with D3 2 times a month is if a cham is having issues with organ function then it will not be able to go through the entire D3 production cycle with only using UVB lighting. This is that fine line. Beman is healthy but heck if I know what is happening day to day internally. So I choose not to risk it.
I dust very lightly and only on 2 medium dubia. But what I may consider lightly and a medium dubia may not at all be what someone else deems the same.