You can use everything you owe within Season 2 male at the same time provided you activate the relevant packs.
You can also use everything you owe within Season 2 female, and everything within Season 2 muscular.
What you can’t use simultaneously is stuff from season 1 or stuff from male + stuff from female. Not simultaneously that is. They aren’t cumulative. 🙂
So, yes, you can use season 2 SciFi + season 2 Fantasy at the same time. 🙂 Just activate them both when you launch the soft.