I can not be the only person to think of or suggest this (I did search but it didn't come up)

Anyways the idea is for something similar to the blue mage spell book for either a new or the existing buttons for random mounts and random minions.
Like you select up to 24 and it will pick those at random.
That or an option to select or remove certain ones with a check mark/right click or something.

Just as a kind of quality of life thing.