Interesting! That's really good stuff and Base on your observation together with CP's data, I think we can lay the LoF / Firebird effect on void gate / crossbreed to rest and conclude it has no effect in that regards.
That's gonna shave off 4 out of 7 scenarios I had to test
I now have 4 scenarios to test:
(LA R'yleth)
0 neutral scales
3 Luck
3 Luck 3 Growth
3 Luck 3 Growth 3 magic
All cross-breeding will be performed 50% in waste, 50% in farm lands.
I think we can say that luck affects void gate + cross breed. Now I will test whether growth and magic does as well!