I once was considering adding a Vasudan and Shivan bonus set to the new ships I was making. Here's what I came up with:
TF Apollo-VF Anubis-SF Scorpion
TF Enceladus-VF ???-SF Dragon
TF Angel-VF Septu-SF Serpent
TF Valkyrie-VF Horus-SF Manticore
TF Antaeus-VF Seth-SF Basilisk
TF Hercules-VF Thoth-SF Gorgon
TB Athena-VB Amun-SB Shaitan
TB Apollyon-VB ???-SB Ojas
TB Callisto-VB ???-SB Kahlan
TB Medusa-VB Osiris-SB Nephilim
TB Hera-VB ???-SB Durja
TB Ursa-VB Sekhmet-SB Seraphim
TC Vidar-VC Aten-SC Cain
TC Leviathan-VC Mafdet-SC Lilith
TC Tyr-VC Mekhet-SC Raguel
TD Orion-VD Typhon-SD Demon
TD Zagreus-VD ???-SD ???
TD Megaera-VD Het-Ka-SD Lucifer
TI Arcadia-VI Cairo-SI Arachnas
TFr Poseidon-VFr Bast-SFr Asmodeus
TFr Chronos-VFr Ma'at-SFr Mephisto
TFr Aether-VFr Satis-SFr Iksura
TSc Faustus-VSc Imhotep
TT Elysium-VT Isis-ST Azrael
TEP Hermes-VEP Ra
(Vasudan fleet based off list from current FS Port, plus extras)
As you can see the Vasudans would need 1 fighter, 3 bombers and 1 destroyer to give them equal number of ships, the Shivans only need 1 destroyer. There's not enough Vasudan ships there...