Depends on flock size. Mostly, it will thin your wallet. Hopefully, those aren't freeze dried grubs - if so, a handful is a lot, even for a moderately larrge flock. But the quinoa is no concern.
Flax seed is usually givern around 23% protein, 37% fat, and as I said, good AA profile for a plant.
Live (or dead, not dried) grubs atoub 15% protein, 20% fat, the rest is almost entirely water. Drid, the water content goes way down, the protien ends up around 26-29%, and the fat 36% or higher.
Because both the flax and the grubs (if dried/dehydrated) are nutrient dense, they have the optential to imabalnce a diet pretty easily. Keep it under 10% by weight of the total diet (combined) - and even then, expect its roughly doubling your bird's fat intake - that's as high a number as I'm comfortable with, absent a very active lifestyle or your birds.