Breeding of Mystical Collection cats?

[Marie Starlight]

Yesterday i bought a female and a male of they "super cats" and it is written about these cats: "… and any 2 that are bred will give you a special Kitten! What will it be??? You will have to wait and see!!!!"
I wonder if I should breed these two cats together, or whether it is best to breed them separately, each with another cats in high traits? Previously i have only had a couple out of these collectible cats that i paired togheter and there was no good result. They just gave genesis cats in low traits.

Thanks in advance*
Leah-marie.