Supplementing d3 is dependant on what kind of
uvb light you're using. The Reptisun 10.0 needs calcuim WITH d3, where the MVB?( I don't remember the name, it's the kind used in the UK), needs cacium WITHOUT d3.
Beardies don't need a vitamin "boost". If they're given the vitamin powder on a regular basis, it's pointless to "boost" it, as they are already where they need to be.
Extra protein is also irrelevant, as dubias have a high amount of protein. Eating enough of those cancel out any "gains".
My opinion is to never feed them pinkies, as the fat to protein ration is just simply not worth it. Compare it to a triple cheeseburger. It's not going to kill you(unless you choke (or get impacted)), but you'll be feeling the effects of sluggishness, tiredness etc.... and when you think about it, is it really worth it?
If you want to give a treat, give silkworms. Most beardies love them and they have an enzyme that is really beneficial for many beardie functions.