In that case, I would say Throne is Human Idealism leaf of Social Dynamics, Architect is Alien Hybridization leaf of Transgenics, Aquilon is Biometallurgy branch of Bioengerneering, Golem is just Bioengineering (which seems a buit weird, sharing a branch tech with another ultimate, and a bio-themed one for the non bio hybrid, but whatever. The Unit tooltip defeinitely fits), and geliopod at Transgeneics (also fitting shape of unit tooltip, also weird to be sharing with Architect).
So overall, assuming we're correct, the hybrid uniques go :
Immortal(3 Each, Organics) -> Architect (4 Each, Alien Hybridization -> Throne (7? each, Human Idealism)
Drone Cage (3 Each, Autonomous Systems) -> Autosled (4 Each, Bionics) -> Golem (7? Each, Bioengineering)
Nanohive (3 Each, Collaborative Thought) -> Geliopod (4 ach, Transgenics) -> Aquillon (7? Each, Biometallurgy)
Furthermore, brief tooltip screencap verifies that old hybrid building affinity levels are probably staying the same (IE LEV Plant was 5 Purity before, will stay 5 Purity)