Nope, 1st season packs work on their own, they are self-contained, while you can use everything from any 2nd season female pack on another 2nd season female pack.
The main reason appears to be that the basic character is the same, while, well, a Fantasy Dwarf doesn’t really look like your common Fantasy Elf, so… well they wouldn’t fit in the same set of Season 1 armour 😉 🙂