It’s been suggested many times that egg missions be scaled to level, and I agree with that totally.
But they should also be better calibrated. For instance, use Nova 9 times is NOT a fair mission, because you can only use that spell once per run, whereas most other spells can be cast repeatedly during a single run. Using Nova nine times, at 2-3 min per run, means that mission takes close to half an hour to fulfil. Another example is “Do 40 million damage with Aibrean” as soon as he is hatched and has less than a million attack. It could take 40 runs to do that much damage with such a tiny dragon. It’s not realistic to expect anyone to spend a lot of money very quickly just to get the sigils required to level him to Obsidian for big missions.
Just an observation.
(P.S. I don’t know if there is a specific mission to do 40 mil dam with Aib, I’m just using it as an example. I know there is a 40-token mission to do 22 mil damage with him, so I imagine the equivalent lvl 3 mission is something close to that.)