In case you didn't know it, Seraphine is Caelum priestess.
A little something that might be interesting: Van commander leading a group of Vanir (=Vans) and Valkyries, equipped with a Flying Carpet. You can sneak, sail and fly! That is some crazy sneak attack potential.
I just realized something that might make Return of Raptors theme of Caelum quite a bit more powerful: stealth! Stealthy fliers, just imagine the power! I'll have to check what units are unique to them, but I might be putting together a little mod...