Splitting custom groups across missions

Aside from making multiple custom groups for one or two enemies, is there any way to only include specific members of a custom group on certain missions (kind of like the all PP mission)?
For example, I make a custom group with minions A and B, and Lt's X and Y. Is there a way to have mission 1 only spawn A and X and mission 2 only spawn B and Y?
Is my only option here to make one custom group containing A and X and another custom group containing B and Y? I'm assuming that would take up a lot of space having to load two custom groups into a mission.

There is no way to do that.


Note that the Paragon Protectors example you gave are NOT part of the Crey Enterprises vilain group - they are in their own, custom-made, "paragon protectors" villain group which exists just for them.

The only way to do what you want is to make more than one enemy group.

You could do as Fernandes says and make an extra group. I haven't tried this, but you might actually be able to name both custom groups alike. I know I was able to make a custom group named Arachnos with only Mu types in it, cause I wanted a map full of them.