My experience is that a juvenile dragon will eat what it needs.
So I try to offer enough live insect protein to sustain their growth and development , 4 month olds this means AT LEAST TWO MEALS of live insects per day and I offer salad later in the day and leave it for them for overnight until their first insect meal next day. I offer them the insects 1 or 2 at a time until they loose interest in the insects at each feeding, they wont eat more that can fit in..
This has worked well for me for my hatchlings and juveniles.
IMO you can overfeed a juvenile greens if this means they loose interest in their live insects and don't get the insect proteins and fats they REALLY NEED.
The salad items I tend to offer are
>>> buk or puk choy greens (for Ca and fibre, not the whites - I feed that part to my crickets, superworms and mealworms
>>> kale greens (for Ca and fibre)
>>> raw peas chopped (for protein)
>>> raw green beans chopped (for protein)
>>> grated carrot (for
hydration and colour)
>>> grated sweet potato (for K and
hydration)
- I add dandelion greens (rich in Ca and fibre), nasturtium greens (same)