I use this:

Blueprint'/game/mods/Godzilla/Dinos/Godzilla/Godzilla_character_BP.Godzilla_character_BP';Blueprint'/Game/Mods/PublicGhidorah/Dinos/FixedGhidoTesting/Ghidorah_character_BP.Ghidorah_character_BP';Blueprint'/game/mods/Godzilla/Dinos/Rodan/Rodan_character_BP.Rodan_character_BP'

And all three of b*stards happily spawn with SS and I have regrets. Their aggro radius is measured in light years and they are getting uncomfortably close to my base. 😭