Best way to clean menagerie?

Hi you guys,

how do you clean your full menagerie from useless beasts?
I do it the usal way and spam clicking for 10 minuts every time till I get tenosynovitis.
Is setting up autoclicker allowed in this context?

It is the worst and most tidious thing in the whole game I think :D Most of the beasts are absolutely useless, there is no way to filter them, no way to stop collecting them and no option to delete them all. Just clicking an X button. And to make it worse, there is always a window asking you "Oh, are you reeeeealllyyyyyy sure you want to delete this useles beast? Oh reallyyyy you want to do thaaaaat? Ohhh you want to delete another oneeeeee? don't you want to change your miiiiiiind?

The question that pops up for me is, how the replacement effect with full menagerie acctly works. How does the game choose what beasts to replace. Is it based on first in first out? Or does it first replace yellow with red beasts?
Anyoe got inside into this?

Just found out that you can press ctl click to skip the "are you suuuuurrree???!" message :D

Still, is it acctl worth it to delete beasts or does the system keep the rare beasts from deleting till the end?

This question comes up a lot for well over a year now. I have not seen an answer as of yet.