So. Ran all my energy, and the energy from gathering, and my *best* run on the Advanced red bloom dragon mission gave me two level 20 dragons and 3 level 5 dragons.
No sign of a single level 100, and the amount of level 5s was unreasonably high for the energy cost. I may as well have run the intermediate one.
I know RNG is gonna RNG, but that's pretty bad.