BE - How does one alter / disable Artifact spawns from different sources and replace bonuses?

[Galgus]

I'm wanting to make a mod that removes Artifact spawning from Nests and Resource Pods but guarantees them from Expeditons, alongside replacing the current bonuses for combining them.

For replacing Rewards, is it better to just delete the entry and add a new one while replacing RewardPreference?

I've been looking through other mods to try to learn how to do it, but it'd help if you could tell me what to look for.